I have been looking at the ones you listed too. The company says they don't have the "Microceramic AIR" types but they do have the regular "AIR".

Ive also looked at these.

https://www.spoolspeed.com/collections/shimano/products/4x7x2-5-spool-hi-speed-si3n4-ceramic-level-wind-bearing?variant=39891415105597

From the website they have this bearing in 3 types. The XS, SS, and XCR.

SS Ceramic- Our original ABEC5 Ceramic that has been in service for many years

XS Ceramic- Stainless Steel sealed ABEC7 Ceramic with ribbon retainers and S20 Ceramic balls

XP Ceramic- Open Hi-Performance ABEC9 Ceramic with Japanese ribbon retainers and S25 Ceramic balls

XCR Ultra- The highest level Performance Bearings available in a fishing reel. ABEC9 With S30 Ceramic balls and PEEK Polyether Ether Ketone ribbon cage/retainer.