Sadly Barenia IS quite rare - it's just not completely nonexistent

My store, which is a flagship, told me they hadn't seen a Barenia B in years (they did offer up a "Barenia" fauve croc to me, haha, I WISH). Men's bags are coming in, like the City Hall and Shark Bolide (I saw both when I bought this bag), so I don't think a 40B is impossible.
That said - to be honest - I wish I could have found a preloved Barenia Birkin rather than buying the new one. I am one who prefers the patina created by someone else

however I haven't seen a B35 or B30 in Barenia at resale recently that wasn't stained or damaged past my comfort zone (or nearly as pricey as a new one). If one shows up before I take my new B out I just might switch out. Same with the black Barenia B - if I see one with PHW at resale I won't wait for the boutique. However - if new from the store is your dream - you should hold out - there is definitely more Barenia than there was