I'm in contact with a company that sells the gasket set and front seal. I'm not sure what other parts are required for a rebuild. I know there are bearings too, but if the compressor spins fine, just gaskets and seals should be enough. On my compressor the front seal is leaking also. We'll see what they have to say tomorrow. From what I see a rebuild should be around $50. But once I have access to their site, I can get a better idea.