this is a company who makes die-cast aluminum boxes, I guess other
things as well but I don't know. most chances they are from the far
east but not for sure. the company's logo is two squares one inside
the other, inside the smaller square the letters dcp (in lowercase
letters) are showing. I want phone, fax numbers, address and email if
they have one + website.

Good news and bad news. I have found a DCP that deals in die-cast
aluminum products, but you may not be able to get hold of them.

"Die Cast Products / DCP 
 621 W. Rosecrans Ave. 
 Gardena, CA 90248 USA 

 Phone: 310-324-6615 
 Fax: 310-327-6345 
 Website: None 
 email: bernsenm@paceindustries.com"

http://sensormag.com/search.exe?a=sc&no=33244

If this was the company you were seeking, this industrial liquidation
listing may mean that the company isn't around any more:

http://64.233.187.104/search?q=cache:GCpIx5snNqYJ:www.tauberaronsinc.com/diecast/diecast1.html+rosecrans+%22die+cast+Products&hl=en%20target=nw

i sent an email and asked them if they made the "wah pedal" shells for
a comapny called jim dunlop. this is a company that makes guitar
effects and they use these shells that i want to know who makes. i
don't this is the company since dunlop is still selling wah boxes with
the "dcp" logo inside.

Is the wah pedal shell from a Jim Dunlop GCB-95 Original Crybaby Wah
Wah? If not, can you be more specfic about the type of Dunlop wah
pedal (foot activated, multi-pedal function,etc.) or anything that can
better describe the specific product? If you are sure it is aluminum,
that narrows it down somewhat but I'm still left with a few
possibilities and they may source the various shapes from different
vendors.

yes i'm talking about the gcb-95 but i think other models as well.
teese (wah maker) is using these boxes. in fact you can see a close-up
of the small symbol inside the box in this page -
http://www.foxroxelectronics.com./Wah%20retrofit%20Teese%20RMC1.html
just scroll down to the 4th picture. i'm 100% sure this is an
aluminium die-cast, just look at the shape of the box.

http://www.pisotones.com/varios/CryBaby/CryBaby.htm

This page should lead you to at least two people that know the answer.

yes, you would think that. but they don't.