This is sooooo upsetting and I have not yet gotten all the details - but my supplier let me know that the 8.5mm Orbit Micros are discontinued for the time being - something about FDA approval.
For now, I will go to the Orbit 90s but not thrilled - but I'm NOT going back to the non-360 type - so old-school.
Anyone else heard about this? Hoard 'em if ya got 'em!!