>Is this part still available new?
I don't think so... As I recall, some parts houses offer to sell you a 'reconditioned/reman'd' EEC, where they may want yours turned in towards the purchase price.
Best way is to try the classifieds here as already suggested. You will get something for a much better price... I've snagged used ones for well under $50.00 from yards. My current spare is for a 1990 auto, non-california. I've heard that there are factory upgraded EECs with 'improved' hot/cold start algorithms for the '90s, but I haven't run across one yet.