Gary try these
www.nemscalecars.com ---> Pretty decent selection, and a few upgrade parts like roll cage, exhaust
www.customRCcars.com ----> Most if not all stock parts, and a few upgrades
www.toyhaus.com ----> real friendly to deal with, and they have an intercative diagram of CEN cars that you click the part you want from the sheet and order it. Helps if you dont know the part number. Here is for CEN
www.toyhaus.com/parts_selectcar.html
www.avidRC.com ---> good for bearings not much else for CEN.
www.bocabearings.com ---> another good place for bearings
www.rc-solutions.com ---> Decent full roll cage nothing else
Thats about all I have so far I haven't ordered much but the 2 times i did from toyhaus fast and friendly, spoke with the guy a couple times really nice, and really helpful
Hope this helps
Tiny