I have used the IWB Bianchi 100 professionals,..not bad, but it's not my favorite.
At the moment I have on an old IWB Bianchi model 3S Pistol Pocket that is holding a S&W Model 36 Chief with 3 inch barrel. I think Bianchi still has them available. I carried this handgun in this particular holser for several years,..rotating it and a Walther PP in ths same style holster. You can do hand stands and jumping jacks with it. Ymmv