you cannot get just the orings for the shocks. you will have to buy the rebuild kit unfortunately or find a metric size x-ring which is nearly impossible however I have heard Kyosho X rings fit. just go to Google and type in SCTE 2.0 explode. you will get a full exploded view of every part with its number. also search bulletproof diff on these forums and you will see a guide to using different parts for better diff rebuilds