GCS can afford to be creative, they needs players like Wally.
Professional, mature, level headed and a team-player. Would be a significant step in changing the culture up there plus they have the cap space and picks to get a deal done.
Edit: as it stands they have 2, 17, 26, 28, 38 & 42 before the likely pick 3 compo plus a potential PP at the end of the first round.
They have plenty to offer us for Wallis if he did choose to leave.