JPS is still in business but, as far as ham radio is concerned, they may as well not be. Check this link for their policy on ham support:http://www.jps.com/index.asp?node=70
They do say check with Timewave for the ANC-4 but don't mention anything else. I have an NIR-10 myself but fortunately it still works. Guess we all have orphans.
Good luck with it.