I've worn the original holster with the gun in it quite often as well, be it in the woods on my land or for historical shows, or even sometimes in winter, under my coat.
Regarding the left hand custom, I've had a TT-33 holster done like that when I was visiting family in Russia, I gave it to a professional leather tailor (not sure of the word, I'm not a native speaker) which did it with his tools. It will definitely be more expensive in the USA, but you could still find a good craftsman to either modify a pre-existing military surplus holster, or do a new one out of new leather according to the Polish Army pattern.
OLD, TIRED, POLISH MILITARY HOLSTER????
Leather to kydex, factory or custom.