I've been wearing Assos F1 Mille for at least 15+ years, probably longer. I'm not sure if this particular style is still in production. I have five pairs so haven't needed to look for them recently. I think they are fantastic.
Shortly before I retired I saw a really good deal and bought three pairs to add to the two I already had. Basically I knew it would be hard to afford them on a pension.
Be prepared to pay £90-160. Depends where you shop and what deals are around. £90-100 is usually achievable.
When you try on any bib short be sure to bend in to a riding position to check the fit.