aviator holster
Quite a few years back, I bought a repro "aviator holster" from an outfit called Pacific Canvas. The holster is patterned after the WWII pilots holster and note that it is NOT configured like a tanker holster. There are not buckles or cross strap on the "aviator", you simply duck into it. I dunno if Pacific Canvas are still in business or not. I specifically bought the revolver version (they made one for the 1911 as well). I use that holster to carry a 4-5/8" Blackhawk and am satisfied with it.
It is not a concealment rig. But it carries the revolver away from my waist, comfortably protected beneath a jacket or whatever, when I am on ATV, on foot, or in and out of the 4WD alot.