I don't know of any official channel to make that request, but you should start with a (paid) tech support ticket from within your eBay Dev account.
There's also the eBay Dev team's public-facing contact-us page that may be worth a shot.
If nothing else, you might need to somehow go through Terapeak and strike a deal with them. They have a paid API last I checked.
2 People are following this question.