Pioneer 1100 spur or sprocket+rim?

[Foxfire]

I was given this saw a few months back and well I finally took the time to get it running yesterday. So now I need a new spur or sprocket/rim. I wasn't able to find any numbers on the spur that's on the saw, nor have I been able to find any online. I've read a few threads with the same question but I haven't found any definitive answers. I'm not planning to use the saw (other than when I want to have an excuse for not being able to hear my wife) so I don't care which I end up with. I just want to get it cleaned up and functional for now. Oh yeah, I'm looking for 3/8" pitch if possible...