Hey Don, I got 3 from here, so far they are the best at staying snug and giving good support...
http://easyaccessclothing.com/ They are all hand sewn by these guys, not shipped offshore for making, I like that aspect, and WELL made... I am 5'10 @ 150 lbs, and the small with a hot wash to shrink it, and it is really snug, they way it should fit to work the best... there are several other sites, but more $$$ or not well made at all, The one I got from Gabby's had the threads along the cuffs coming loose after one wash, and the small was too big by a mile for me and had to be taken in about 2 inches... Angelfluff has them but are way up there in price, over $50 a piece... several ABDL sites have them, not listed as a concealor but a onesie, same thing anyhow, but I stay away from buying anything from those sites... The shirts do help with the incon problem, but not something everyone is comfortable wearing, for me it is just another tool in my weapons to attack a rather frustrating problem to begin with... Puffy