Seal/Gasket kit for Powermate 4-Gallon air...

Question

This thing lasted about ten hours before blowing piston seal and o-rings. Trying to find a repair kit has been a nightmare. Coleman went bankrupt and just my luck..I have one of the two compressors made in Italy for Coleman and the new owners of Coleman/Powermate will not stock any parts for my model. Any idea where to find a seal repair kit? It would be so easy to fix if I could find a kit. I can make the gaskets but the piston seal is out of my expertise. Please let me know if you can help. Neither Sanborn or Coleman were of any help. Thank you.