Thank you. I was doubtful about the third-party replacements; I'll give them a try.

I still think it's scandalous that Bose ships them with such a crap failure rate.

(If they're expected to fail like this, then at least ship them with a few replacement pairs included. At least that would be honest, and at the price they charge, probably still profitable. /s )

I've kind of standardized on Bose headphones because even though I hate crap like that, they're so popular that there's a big ecosystem of replacement parts, batteries, etc.

It helps that the earpads have been unchanged across multiple generations: QC25/35/45 and I think their new ones as well. Everything but the Ultra and NC700. So I expect replacements should be available more or less indefinitely.