Luckily I live fairly close to Casio's Canadian head office and have become good friends with the manager of the parts dept. I went in about a month ago to order some spares parts for my MIRB Frogman and was told that the band/bezels were heavily back ordered(2-3 months). He told me he'd see what he could do and voila, 4 weeks later my order had arrived. Along with the band/bezel I ordered a few gaskets, 4 black bezel screws(forgot to include them in the shot) and 4 titanium bezel screws for my atomic Gulfman.
Pic of a couple of other spare Frogman band/bezels sets which I have acquired as backups for my existing watches.
On the left - band/bezel set for the basic blue GW-200 frogman(almost impossible to source now). On the right - band/bezel set for the black/blue triple crown of surfing Frogman.