Looks like you're missing a rear diff cover, a rear camber link, battery tie down...
I've got a ton of spare Pro 3 parts I'll never use. Many of them have seen some use, but whatever you're missing, I'm sure I have (except maybe the battery hold-down, I think I only have one).
EDIT: I've got a couple Orion LiPos that do fit, but I don't know if they're still good. I went back to NiMH because the car's balance was way off, and it was traction rolling like crazy with the LiPo.