Well, in that case you might have to throw a little more the other guy's way. I'd start by just tacking Nittymaki on the end so that the guy feels secure in the fact that you're not going to end up screwing him over if Biron falters. If he doesn't like that, you know where to go from there, just start asking what he's interested in and add a few more pieces to the puzzle.
I'd certainly go for this as the basis for a trade though. If you could have Fleury and Price as your two goaltenders for a keeper league.... Well, that's almost as good as a wet dream.