Back in the late '70s-early '80s, I bought a 4" M34. I also bought a 4" Bianchi 5BHL holster in brown. This is a lined high-ride, thumb break. This model was discontinued shortly thereafter. Bianchi continued to offer a strap-over-hammer version.
I sold the M34 a number of years ago, but kept the holster. No, it's not for sale. My .32 Regulation Police rides in it these days.
Check eBay for good, used Bianchi and Safariland leather holsters.