I have a used 360 pipe and manifold, if you want it. It's not pretty, but it's here. You will also need the 360 shock tower, which I may or may not have. It would be included in a new kit, if you were lucky enough to find one.
Also, you mention parts availablity. A good portion of the parts are still around, some because of newer models using them, others, because of a good supply remaining. Tower is a pretty good indicator of Traxxas parts' status. If it's discon. or doesn't come up at all, it's gone (as far as production). At that point, you start digging eBay and hitting up the local shops.
If you would like a copy of the manual, send me a PM.