Ebay, classifieds on here from time to time, or even over on boostcruising.com (just take a golf club when you go to pick it up )
even nengun.com sells second hand pfc's sometimes
Having said all that, I picked up an emanage and am just saving to have it all set up. But I'm not chasing monster power - I'll be happy with 200-250kw with stock injectors, stock/high flowed turbo etc, still using AFM as well. Emanage will be fine for that.