FX Impact Orings I can't find the right Thread on Them

Hey guys I know this has been covered and I've watched Ernest's videos but I can't find all the orings I need at the oring store I want to take my Impact apart an check everything that Ernest talks about doing to get the fps up I've adjusted the power wheel hammer spring per Ernest's video and the valve adjuster but these are the fps I'm getting in 22 and 30 30cal 834fps and the 22 is 870fps tops, so I'd like to take it down clean it an replace all the orings and anything else that needs it any help will be muchly appreciated.



Thanks Terry