Welcome to the Romanian sling hunt
There is no reproductions I know of, and yes, an original is really that hard to find.
Now as for price, ask, what it's worth to you, my most expensive was 80 bucks, then I scored two for 45. You could get lucky and stumble on one the person has no Idea what it is or fits, or you will find one the seller knows exactly what he's got.
The Romanian Ak sling fits, but looks kinda cheesy after you see the original
The originals look like these