As to the status of APX: I'd probably be the last one to hear about it. I'm not "in the know" on these kind of things. I've got a good stash of sheets and 120 rolls, tho.
As to Pyrocat-HD: Read the articles at unblinkingeye.com:
Pyrocat-HD works great in rotary processors. You do have to mix it yourself, but it's very easy to use. I like it a lot, it's my developer of choice nowadays. No need for a nitrogen burst system or any additives to prevent rapid oxidation and extra fog.