Congrats on your lucky find and purchase! I could/would be jealous but I currently have eight F2s (3xF2AS, 1xF2A, 4xF2(all DE1s) in my arsenal. Despite the manifold advances in technology over the course of the last several decades, these mechanical gems remain my all-time favorites (obviously!). On the repair issue: hand your "baby" over to a professional; spend a little extra and let an expert handle the job (That said, drop Jon Goodman an email re replacement foam; re-foaming requires a little care, but is easily done with a little time and patience).