I use now-discontinued nylon IWB rigs from Eagle Industries, which were ahead of their time in the use of a belt loop coupled with all-synthetic construction. (Everybody else at the time used clips.) They do not have anything to keep the mouth of the holster open after the gun is drawn, so some frown on that, but one-handed re-holstering was not considered a priority at the time these were made. I have one made for 4" large-framed revolvers, which will work fine with up to 5" barrels, and another for 3" medium frames. I have Milt Sparks Summer Specials for snubbies with the correct angle for AIWB, though their website does not show they will still make them for that angle. In modern stuff, I really like the looks of the rigs made by crebralfix, though I have not handled one in person.