I'm a big fan of Simply Rugged holsters. The wait time is 10 days or less most of the time for a plain holster or one with a simple border stamping IIRC. Even a beautiful floral carved holster I received within a month when I ordered it last year.
Great quality, modestly priced AND received before the next visit of Halley's Comet.
NOTE: one thing I just learned about the Simply Rugged pancake holster is that it actually makes for a very comfortable IWB rig with the "IWB loops" they offer. I've used these pancake holsters for a number of years now and every revolver I have this is what I carry it in, but it's hands-down always been my go-to OWB for revolvers...
However, in the past month now I've tried carrying my 4" N-frame 624 in the pancake IWB and it's surprisingly comfortable! I'd have never believed it if I didn't try it myself (a BIG revolver!).
I'm retired, a big guy and dress casual in Carhartt canvas shorts or pants (one size bigger to accommodate the IWB holster) and untucked shirt of whatever type. A sturdy belt is required of course. I now carry the 4" 624 every day, all day in this way - it's my preferred mode now. Again, I'd never have believed I could comfortably carry a 4" N-frame IWB this way.