RE: need screws for RRP? Diffs, HELP!
Just a suggestion and I hope it will help you. Could you try your local hobby shop if you have one and maybe compare hardware? Sorry to sound ignorant and stupid, but what is a rrp? is it a monster truck? If you can find the thread pitch and diameter, and length, there are good chances you can find a match. Try going to tower hobbies and looking up some different monster trucks and there parts list tower gives pretty good descriptions and parts breakdowns.
good luck