Some of the sputtering could be the throttle trim on your transmitter. The other stuff could just be junk gunking up the speed control (probably not the radio). By the time you get it all apart and cleaned up, you might find that your glitching goes away when you get it back together - you never know...

As far as parts go, this is a good starting point:

http://www.teamassociated.com/misc/d...db_kitrc10.htm (parts list)

http://download.teamassociated.com/p...awing_10ce.pdf (drawings/diagrams)

You'll find tons of parts on eBay, or search http://www.towerhobbies.com with rc10. AE has just about everything available right from the website or phone. You can also use a lot of the newer parts from the rc10b2, rc10b3, etc.