Your best bet would be IMO to go to small gas engine repair shops that repair chainsaws, weedeaters, mowers, Ect... They usually have tons of old saws and parts laying around that people brought in but the repair costs was too much to pick up or just abondoned the equipment cause it was not feisable to repair. Yes, you will have to pay something for it, the repair shop is looking to get something out of that stuff. Some want arm and a leg and some understand it's worth little.