I seek contact information for professional instrument builders who
have made the following (or as close as possible):

*7 string electric guitarlele
*baritone acoustic guitar with full (12+fret) roundneck and kona body
*8 string bass banjo (that is, banjo equivalent of bass guitar with 4
double courses)

el_gitano:

The specifications for your instruments seem to necessitate custom
makers since the stringing you require is different than what is
commonly available.  The following lists should give you enough
contacts to get these instruments manufactured albeit at significant
cost.

Guitarlele (7 string)


Risa is a German maker of guitarlele's (six string).  You can contact
them with your specification to determine whether they will make a
seven string for you in the tuning range you desire.

    http://www.risa-music.de/Brochure2.jpg

RISA Musical Instruments GmbH
Pferdsbachstr. 31
D-64823 Groß-Umstadt
Tel.: +49-(0)6078-911183
Fax: +49-(0)6078-911176

eMail: info@risa-music.de
Internet: http://www.risa-music.de

The following custom makers ask for your specification and they are
ready to make something for you.
    http://sjryder.com/
    http://www.stringedthings.com/main.htm
    http://www.vauxguitars.com/home.html
    http://www.specimenproducts.com/instru/peanut.html
    http://home.att.net/~masson/E1.HTM


Baritone Guitar with a round neck and kona body fully fretted

This instrument seems the closest to exiting as a regular instrument
which you can find at the following reference points:

    http://perso.wanadoo.fr/swer/english.guitars.weiss.html
    http://www.mimf.com/

Bear Creek Kona style
    http://www.bobbrozman.com/bearcreek.html

Although you didn't ask for resonator guitars (slide Hawaiian), the
following reference seemed interesting to me.

Resonator guitars

     http://www.well.com/user/wellvis/acoustic.html

Bass Banjo

With regard to the Bass Banjo, more of the instruments shown were four
string.  It would seem like a simple task for any of the following
makers to customize one of their regular offerings into a 8 string
instrument.  The instruments shown in this category are quite large
meant to be played like a small standing bass or a very large banjo.

   http://www.xstrange.com/bassbanjo.htm          
http://www.goldtone.com/products/details.asp?subarea=specialtybanjos&subarea2=BB-400
   http://atdot.com/bassjo/
   http://www.thejethros.com/BassBanjo.html

The instruments you want are quite unusual but the references shown
should enable you to have them built to your specification.  If there
is any clarification I can give, please request the information.

Thank you for asking answers.google.com

seedy

Of course, there are several makers of six string
guitarlele's.....I've send emails to several of them to see if they
would make a custom seven string.  What is the tuning for the 7
string??

Hello el_gitano:

I received a reply from one of my emails requesting information on a 7
string guitarlele as follows:

From: "Roy T. Cone" <roycone@pointecom.net>
To: seedy (stripped of direct address)
Subject: Re: 7 String Guitarlele
Date: Wed, 5 Jun 2002 08:37:22 -0500

In response to your reqest of a 7 string guitarlele:

Thank goodness No.

RISA in Germany make a 6 string Guitarlele.  We are one of their new
dealers.
We do not stock this instrument, but can order it for you.

Attached is the specification sheet

Keep Strumming.....
Keep Smiling.....

Roy T. Cone

The attachment was the following URL:
     file:///C:/eudora/attach/risa6string.jpg

Are you set on a 7 string??

seedy

Dear !
    what u are searh is very hard to answer cause u dont mention  their skill
there are some in India also but what i mean is that what builder skill u want?
if u do so i will answer u !!