My friend buys these shirts in bulk and irons vynl on, there good quality and nice an big, if you want i can give you his name and can talk to him because idk if this is the website he gets them from but i know he buys them and bulk and for really cheap.
http://www.bulkwholesaleapparel.com/2BDBA7736A4B4410B7352E12448D2824.asp?cat_id=9D6139260FF14BBBBD599CBDCDFF5521&pcs_key=E6399BB2A80C485DB226B5A144D2395D&retpage=%2F9C5C331ABCAC4A588698462698290BB6%2Easp&nm=G200T+Gildan+Tall+6%2E1+oz%2E+Ultra+Cotton%AE+Short%2DSleeve+T%2DShirt&spath=HOME+%3E+Brands+%3E+Gildan+%3E+T%2Dshirts&path=HOME+%3E+Brands+%3E+Gildan+%3E+T%2Dshirts&sc_id=00CB839BF8564E2AAAFA8E61DA2C06BD