machinning plastic takes time and as to be done slow so you dont melt the plastic. this is what i found
http://utvinc.com/utv-inc-polaris-rzr-xp-front-a-arm-delrin-bushing-kit/
bones what arms are on that car, thats what is gonna make the call. mostly everyone local used kartek delrin, i think theyre still around 7 a piece though