Parts Jazz Question

[LarkinLondon]

I just bought a Jazz bass body to re-finish, and I plan on going ahead and making a parts jazz out of it.

I was wondering where is the best place to get the parts for it?
The bridge, tuners, neck plate, control plate, ect.
Is it better to buy them new? If so, where's the best place to get them?
Also, where can I get them used?

Of course, the goal is to get the best stuff for the cheapest I can.