Hi Seth,
We cannot authenticate or give prices for items, just help with dating.
I can see why you cannot find anything like it as it is unusual, it looks early 1980s to me but I cannot be certain, the
reason I think that is due to hardware on the piece.
To get an idea of pricing, look around on selling places, like ebay, etsy or other online venues of items made with pony fur hide.
Koret New York still exists as a company perhaps you could get in touch with the actual company and see if they can help out.