Any body for the mbx5t will fit the TR, RCBodyworks has a body specifically for the TR and I see Odonnel has a body for the TR.
Robert.Hull says the stockers are big bores,the Jammin bigbores will fit the TR with no mods.
I have a Jconcepts Illuzion on my buggy.Mugen springs will work on the Tr, they seem to be longer though, makes it a little harder to set ride height. Alot of people run the Cen blue springs on the TR, I run the Mugen red springs.