Sure, no problem. Glad I can help!
This all depends on how much money you want to spend or if you are willing to do some grunt work and keep your money in your pocket.
First, the money route:
There are services online that allow you to search for sales reps for your given industry. One of them is called RepHunter. Sales reps register with them to be put in their database of reps. RepHunter says they have a network of over 7,000 sales reps in their database covering various industries. They have a couple of different pricing plans, but this service is pretty expensive and I would only recommend it for someone VERY serious about getting a rep, not just doing some inquiring. They have plans that start at $299 for the first month, and $100/month thereafter and you can cancel at anytime. You can also get a 12 month subscription for $1000. Again very expensive for something you can find out with a little work. There is a site called Infomat that has listings of sales reps that you can buy also. Which leads me to the other method...
So, next, the grunt work route:
There have been some inquiring about tradeshows recently in other threads. This is a great way to find sales reps! As I said earlier, many reps represent more than one line of clothing, so they will take all of their lines to a trade show to generate some sales. Infomat sells directories of sales reps, but there is enough info on their site that you can piece together enough to find what you need.
They have listings for all kinds of tradeshows. If you go to their site, click on "calender" on the left. There will be a listing of different categories alphabetized. If you look down at the bottom you will find, what else..."t-shirts!". This will lead you to all sorts of trade shows that include t-shirts. This is where the work comes in. You have to click on each show and go to their individual sites. Try to find the exhibitor lists. Some sites list the individual sales reps within the exhibitor list. The real key is finding an exhibitor list or directory and then finding the reps that are showing those lines listed. The person listed that you find will more than likely be an indepenent rep, and not necessarily and exclusive agent of the company that they are listed under. If it doesn't say, you can just call them and ask.
Hopefully, I've been clear. If not, just ask and I'll try to clear it up as best I can.
Here are the links, if that's okay...The infomat link will take you directly to the trade show listings!
Rephunter.net
Infomat.com