[gh02t]

I actually mostly called up HVAC supply places but they wouldn't sell me a cap and offered to refer me to one of their "preferred" service providers. Maybe it's some backdoor colluding in my area, who knows, but yeah I was really surprised they wouldn't. I think I called 3-4 before someone told me Grainger sells 'em.

[bigfatkitten]

It's pretty common for outfits like that to be "trade only" and not do retail sales at all. Electrical wholesalers are often the same.