Al A. wrote:
... I tried the biggest old-tyme
hardware store around here (goes way back to the mill fabric mill era, 7
HUGE creaking floors of stuff, some of which I'm sure has not been sold
in 30 years, etc.), ...

Ah, that would be McKittrick's - incredible place.

I have seen them at O'Connor's in Billerica. 'Can't remember how long
ago, but if I needed them, that's where I'd go.

Bob