Well, I did some snooping and there appear to be abundant quantities of FQA11N90s available - just not in US franchise distribution. This is what has happened in the past - most of the devices we're using didn't come from standard distribution.
I have hundreds in my stock, and have located another 1000 more without too much work, should we ever need them! The price is still between $3 and $3.50, so definitely the best price-performance device out there as of this time.
Just thought I'd update the situation.
Regards,
Steve