I havent taken the time to read much of this thread, but FYI, i just bought from the "Darevie official store" on Aliexpress a bib with the "elastic interface Paris HP men" pad, which afaik is very well regarded (120kg/m3 density in some parts, all foam, no gel), for 29 eur, shipped to Europe. It's black, nothing special, but it's the 1st time i see BIB at this price point with this pad.
It's under the "choiceday" thing on aliexpress, so it's unlikely to last, i guess? Headline price (BS, for sure, but still) is 70 eur. Their lower spec BIB from the same store is several euro more expensive.
The store itself has thousands of transactions, 98% positive reviews, blablabla.