Don't know about a part number but the 3/4 tie rod ends should not be hard to find.

Chevy Duty, Jim Carter, and American Classic Truck Parts all sell them. I would list the links but that might be considered selling.

Is it OK to post links of vendors (is it OK to mention their names)?

I would first check local auto parts stores (but finding someone who wants to look for an older part can be a problem).

Tim