Whitley

Hello, I recently acquired a partially disassembled 1965 YM1. I'm working through what i'll need to get it up and running and my current hurdle is the petcock. Mine is missing the internal filter screen and the two copper pipes with their filter screen with the pipes being broken off at the base. So far I've found 1 replacement on ebay listed at $250 which seems to much to be paying. Are there any cheaper alternatives or kits to rebuild my part?