I have three of those around here someplace, two top handles and one rear handle. Two of them ran at one time, one is nearly a complete parts saw. Parts are still available for them from several suppliers. Randy's Engine Repair in Ohio has quite a few hard to find items for them.
I gave up on mine, just too unreliable no matter how much effort I put into keeping them in tip top shape. I replaced the fuel lines on mine and rebuilt the carburetors, and still they were difficult if not near impossible to start. The fuel consumption was too much for my liking, and they never would maintain a smooth idle no matter how much time was spent tuning them. I suspect the crank seals are leaking on both of mine, as they both tend to stall if moved quickly when they are idling, and the idle speed and quality changes constantly after they warm up. When I was using them, they did OK, but the modern saws in my line-up are superior in every respect, start with one or two pulls, and run flawlessly in all areas.
Email me if you need any specific parts, I might have them. I'm going to dump these saws on EBay at some point, just haven't had time....Cliff