Kelowna Airsoft is a distrubitor of
www.uncompany.com, you should be able to order one through them
I've seen two different M82A1's on UNCompany's webside. The difference between the two was, one had a PSG barrel already installed and was based off an M-733, so you could actually fire full-auto and semi. The other was just Semi.
The one based off the M-733 was a couple grand on UNCompany's website last I checked.