depends, budget? theme for a particular decade? magnified/unmagnified?
if you're looking for inspiration then have a look here at some of the steampunk insanity on the table:
https://russianoptics.net
unfortunately with the exception of the PSO, PK-A and the Kobra you're kind of stuck when it comes to repros (a statement i am happy to be corrected on if said correction comes with shop links)
there are 2 versions i've seen for the PK-A, there's the nuprol version (which really doesn't look nice even from a distance) or this version which looks the part although the internals aren't particularly fancy:
https://www.amazon.co.uk/gp/product/B07KVN2GQ2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
my advice be careful how you treat that one, sadly the connection on mine died and it seems to be impossible to access it to re-solder without damaging the thing
aside from that you're looking at having to get the real deal, especially for some of the weirder designs.
fortunately quite a lot of the russian optics are not only still being made, but aren't completely insane pricing at least compared to western optics.
i'm not long after ordering one of these bad boys which should hopefully confuse the shit out of people wondering what the hell it is:
https://russianarmyshop.eu/russian-red-dot-scopes/1275-npz-pk-1-1p63-obzor.html