For people interested in retro soccershirts, jackets and pants (national teams and club shirts): http://www.22shirts.com
This is a much better site for buying retro jerseys, keep in mind that these jerseys are made with 100% cotten, and as a result, are very tough to care for. Not exactly wash and wear. http://www.toffs.com/
I don't know about that, I have several TOFFS shirts - as long as you keep in mind that cotton will shrink after the first wash when sizing the shirt you're OK. I've abused my shirts and had to wash them too often. The cotton material is so thick that that they haven't worn through nor have their colors faded yet.
This site sells the COPA CLASSIC line of retro wear. You can get COPA CLASSIC stuff at their own website or several others. As already mentioned, TOFFS makes high quality retro jerseys, including some NASL teams. Score Draw makes retro jerseys, but no NASL teams. COPA CLASSIC at www.copaclassic.com also at: 22shirts Teamsport-Schlaefer & RetroShirts (basically same place) Eckball SCORE DRAW at www.scoredraw.com also at: Football365 TOFFS at www.toffs.com also at: WorldSoccerShop Amazon.com wadaa.de tshirtgrill.com - some retro NASL shirts and T-Shirts Classic Sports Logos - ASL, MISL, NPSL, NASL, and USA team logo T-Shirts Old Jerseys - some custom made NASL jerseys Sporting Kicks - a couple numbered Cosmos and LA Aztecs jerseys