mkr5000 wrote:
I can't find these anywhere....can anyone give me a source for those
little plastic (or metal) ports
that fit in the tubes for bird feeders?

Certainly, there must be a DIY source somewhere.

Cut the corner off a recessed door pull. Smooth it with a file if it's
metal. PVC or copper pipe caps can also work.


You can also attach flat material across the back of the hole leaving
the slit at the bottom for food access.