Depending on your exact pistol, there are likely many holsters and attachment systems available.
The more common one's pistol, the more likely holsters and attachment systems will be available.
I had to deal with some "Uncommon" pistols for which "modern" holsters were NOT available.
It so happened that various iterations of the Safariland/Bianchi Military holsters fitted my "uncommon" pistols; Some holsters needing some gentle and reversible mods.
I have a 6004 Kydex holster that fits my 1911 pistol like a glove. Just to say I'm not entirely behind the times.
OTOH, I've modified some Safariland/Bianchi Military holsters to decently allow the holsters to carry pistols for which such holsters were never intended.
There is always more one way to skin a cat.
Suggest a "decent" holster is far better than no holster.
I certainly DO need to "Rationalize" my G-Code items and my Safariland items. Leaning towards using Safariland items, and adapting G-code items with Safariland items. Sell-off the rest.