If you need parts list your requirements and use photos or specification or part numbers if you have them. If you are grounded please indicate the urgency level. Do not double post in other forums.
Injected engines do not need gascolators nowadays. I removed mine after the fuel pump manufacturer recommended to do so when I switched from carburetor to injection. I heard of at least 4 other Lancair owners/ builders who did the same.
Jason, that is a really easy part to duplicate. if you can't get one or duplicate one I can remove mine for duping. It would be easy. I do believe the cooling shroud with the vent tube is effective and worthwhile on the IO-550.