The only place you're going to find that would be a parts deck off of eBay or Craigslist if you look constantly. You can find those pretty cheap when the sellers know they don't work and just want to get a couple bucks for them.
I just looked on Craigslist here in NYC and there's aPorta 05 for sale for $65. It's not working and I bet the seller would go for a $50 shipped kind of deal if you ask.