They are few and far between. i have a few all going on rifles. They pop up on GB from time to time. Your best bet is to put a WTB ad out and hope somebody is willing to sell one from their private collection. I wouldn't expect to find anything brand new unused in 7.62
I just sold one on gb for 325 or so it had decent rifleing. I was hoping to get more. Would have never sold it but ssp sold me some cool PLO stuff and needed to free up some funds. They are out there I have owned 3 over the last couple of years.