So it's looking like nothing fits the bill for the larger two calibers?
.41 Mags are pretty unusual to find. Not "rare" but not terribly common, either, and relatively few in shorter-barreled, concealable versions. But, they are as big as the .44s (all N-frames) so there's no practical difference. (There are some custom 5-Shot L-frames, I've heard, but rare and very expensive.)
I do carry a .44 -- a 4" 629 -- occasionally. I compete with it in IDPA and get a lot of general use out of it. However, I am a large-framed guy and I still would agree that it takes some dedication to successfully carry. (Remember, if carrying the gun is a chore, eventually you'll find enough reasons to NOT carry it very often. The gun you DON'T have with you is not going to defend you very well.)
I usually carry it OWB, but I do have a "Miurage" kydex IWB for it that works well.
Here's a couple of pics to give you an idea of what you're considering:
I'm about 6'-1" and around 220 lbs. That gun still takes up a decent amount of real-estate. The holster is more comfortable than it would be because the cylinder sits up on top of the belt instead of tucking in behind it. If I was much shorter, the draw would get a bit awkward from that holster. (Though I think the Simply Rugged and other style IWBs push the gun farther down into the belt line.)