I can't access your pool info either, but I'll offer a few thoughts and ask a few questions. Is this a points league or a H2H roto league? Do you have positional requirements at F [RW/LW/C]? How many G do you play regularly [or how many G count towards your point totals]?
In a 20 team dynasty league [assuming you're each icing 2 G] goaltending will be at a premium because the gap between everyone's top G and their next one will be gigantic. You're on the right track offering a top tier player [Sedin] for a top tier G [Fleury]. The problem in getting this done [and I'm only speculating] is that the gap between Sedin and the next best W will be less for you than the gap between Fleury and the next best G for the other GM. All of this to say if you want to do a straight up deal you'll likely have to overpay to land the G of your dreams. Think D. Sedin and a 1st round pick for Fleury [and even that might not get it done].
There is another way to go about this that I would recommend you explore. Look for some top G talent that either is sucking right now [play on a lousy team...C. Price] or hasn't established itself as #1 starter yet [Rask, Bernier, Schneider]. If MTL struggles badly during October Price will come cheaper than he should and you may be able to capitalize on that. Also, consider trading veteran players that can help GMs win now for some of the G that can help you win in future years [Rask, Bernier, etc.]. See if you can't swing a couple of deals and land 2 of these guys. Hopefully at least one turns into the stud you were hoping for and the other becomes a serviceable #2 G.
10 Team [keep 10 + 4 prospects]
Scoring F=1[g/a]; D=2[g], 1[a]; G=2[w], -1[L], 1[OT], 2[SO] Top 12 F, 6 D, 2 G count
Forwards
Crosby, Ovechkin, Backstrom, Wheeler, Byfuglien, Hornqvist, Simmonds, Ladd, Zuccarello, Ribeiro, Desharnais, Semin, MacArthur, Moulson, Purcell, Soderberg, Dupuis
Defense
Keith, Goligoski, Carlson, Krug, Trouba, Streit, Pouliot, Ceci, Nurse, Martinez
Goalie
Fleury/Price/Rask