There were some done 'inhouse' at GW that came up on Ebay a little while ago for a Quidditch team. There were even rules and a laminated board, they weren't ever supposed to get out though and GW shut the auctions down. They weren't especially good sculpts as they were test ones but the rules etc looked good. I know a guy who got a load and then didn't want them anymore as GW contacted everyone who'd bid etc demanding the figures if they'd bought them....
Had a great line in the email that essentially said "GW has never produced, nor considered producing Harry Potter figures. These figures should never have entered the public realm so give them back to us." He replied saying if they'd never made them then they couldn't possibly be their models

He bought them as he intended to paint up the teams properly and sell them again but doesn't want to now as he doesn't want to list them on ebay and have GW on his back.
I could always ask if he wants to sell them?