Underdash heater/A/C hose

[Gulfgears]

Anybody with a 66/67 skylark with a/c know where to get this hose?

Old Air Products offers the hose, but it's plastic. I would like to keep the original type hose if possible.

My NAPA dealer just looked dumb when I asked them for the hose.

A/C ball vent is 2 3/4" OD, so hose needs to be at least that.

Thanks for any help

[Buickfreak4ever]

Old car parts sell a/c duct hoses.
That's where I bought them, per foot.