Thanks for the info. Went ahead and ordered one. Definitely annoying it was not included, can’t cost them more than a few cents to manufacture...
While I still had a pair of QC35IIs I was able to get a free adapter from a Bose store. I walked in asking to buy one, and the rep just gave one to me. But they definitely don't make the headphones like they used to, that pair broke after just 17 months.