bitbills were never paper though right? Only CC style cards?
Agreed they are the unattainable grail to many.
Krogoth's collection is amazing and I am yet to see one on sale here that I could afford.

Suisse notes were also older and I have only seen second hand here, seems I missed their 2019 offerings.
MJ just posted an auction of some here: https://bitcointalk.org/index.php?topic=5450961.0

Polymerbit are also very good and readily available on their website: https://www.polymerbit.com/