Foster or Robinson for me. Actually, Robinson or Foster, in that order. Robinson more steady but already in his 30s, Foster could grow into the complete 'keeper as he's younger.
Given - age against him now, plus injury concerns. Green still seems too error prone to me - that Wigan winner confirmed it for me. Kirkland has the worst injury record of any player, ever. Westwood I've never seen play. Stekelenburg I think will be out of our reach.
Failing that, I do like Kev Gage's suggestion. I wonder if that massive Russian boxer - Nikolai Valuev - fancies a change of career?