I swear, is someone handing out project 031 saws as door prizes somewhere? Seems like they've been cropping up here more than any other saw as of late. Not that that's a bad thing, as noted they're great saws! I'd be comfortable running mine against any modern stock 50cc saw. Wouldn't win every one but it wouldn't be embarrassed by any standards.
What you have there appears to be in really good shape, at least, and you shouldn't have too much trouble finding whatever parts you need here. Take pics when you get Humpty Dumpty back together again!