Throttle Body Vacuum/Boost Leak

[[ion] C2]

So the throttle plate shaft itself is leaking air when I boost leak test. You know how you open the throttle plate by manually moving the part the cable is connected to? If I wiggle that my air leak changes significantly. It's apparently leaking air between the shaft and the main body of the housing.

From some Googling it sounds like there's a bushing that is worn that causes this. Anyone know a place to send it to that can do a good job on a rebuild?

I'm still working on having a bigger custom manifold made with a used 75mm throttle body that hopefully doesn't have this problem, but I'd like to fix this in the meantime.