I called Horizen today and asked them about the GRP motors and parts.She told me they just had a meeting at the end of last week and Grp came up in it and they were told that Grp is going to make the parts and they would start coming in in the near future.She told me the demand was to high not to make the parts.So time will tell,I have two motors I would love to buy parts for and rebuild.They were two of the best motors I ever had,they just need a rebuild and I need piston and sleeves for them.I'm crossing my fingers.