What are the locations of pattern makers, garment sewers, and fabric
dyers in the Dallas,TX area? For production purposes that is...
example: I want to make 500 green custom cut dress shirts.

Thank you for your question.
 
I believe that to answer it well, your question will require more time
and effort than the average amount of time and effort associated with
this price. Here is a link to guidelines about pricing your question,
in the pricing guide: https://answers.google.com/answers/pricing.html

an extra 5 dollars now!

For 500 green dress shirts made to a special pattern, I would suggest
looking further afield.  Production of clothes is very much cheaper in
Asia, once you can supply the pattern and a sample of the material in
the desired color.
You may want to work with someone in Dallas on the pattern design 
(different sizes?) and choice of material and color, and then have
them made in Asia.

If you already have an example of the shirt you want, that would make
things easier, but it could be that there are already patterns for
dress shirts that fit your requirements.

Y' wouldn't be Irish now, would y'?

I'm aware of lower pricing overseas, but there is a major loss in
convenience. I'm looking specifically for the Dallas area, just as
there are many sewing and dying house in Los Angeles. I know that
these places exist in Dallas, but they are not very high-profile. i.e.
they do not have websites or yellow page ads

Hi Thrilled,

OK, I think if you get one understanding contact in the industry, that
person can probably help you find the next one.  Forgetting dyers,
since I didn't look for any and expect that a green shirt material to
fit your requirements can be bought, this link coud lead you to a
design school, where someon should be able to suggest where you can
get patterns made:

http://www.superpages.com/yellowpages/C-Fashion+Design+Schools/S-TX/T-Dallas/

The following are for manufacturers, who again might be able to help
you with finding a pattern or where you can have one made:

http://www.wholesaledistributorsnet.com/dallas_market_center.html

http://fcs.tamu.edu/clothing/textile_clothes_line_newsletter/vol1_no1_summer1998.php

http://tx.allpages.com/dallas/manufacturing/apparel-manufacturers/blouses-shirts-sweater-manufacturers/

I hope this helps you, Myoarin

Thanks a lot Myoarin. allpages.com is an interesting site. I believe
that Dallas Market Hall is the best start (for anyone else curious) to
finding someone in the industry. I visited some of the 'apparel
manufacturers' only to find that they did nothing but silkscreening
(lots of really low quality stuff, sold in bulk). The whole area is
cheap wholesale goods. However, I know that area is sometimes
considered the 'garment district' of Dallas. I'm really looking for a
place that will take a cut-and-sew pattern for production, with choice
of fabric. I believe I will try to go to some of the next tradeshows
out here. Again, for anyone else interested on the topic, a few nice
apparel tradeshows are:

Magic http://www.magiconline.com/
POOL http://www.pooltradeshow.com/
ISS http://www.issshows.com

Anymore info would be greatly appreciated!

let me know if you find a good manufacturer.  I'm also looking for one
to manufacture dog clothes.