Does anyone know where to get the threaded inserts that come on the intake manifolds that have a cable throttle control vs. drive-by-wire?

These are the threaded brass/copper inserts that are pressed into the manifold. You screw into them and they hold the cable bracket to the intake manifold.

My fear is they are not available seperate...

 

I have a spare intake you can have the fittings...or you can go the dealer and they'll have em for sure

Good luck