Vacuum port on intake manifold

[jasonw]

I managed to break a port off my intake manifold vacuum fitting.
I have an 86 truck with an automatic transmission.

The fitting has a port for the main vacuum line and a port on the top for the automatic transmission, and another port that was unused.

I have tried to find this part everywhere and the best I can find is a corvette site that shows a similar part for around $25 before shipping.

Does anyone know where I can find this part?

TIA
Jason