Well after trying pretty much every skate on the market without success, I finally broke down and got scanned for Trues today. If these don't work then I'm taking it as a sign that I need to retire!
Have you tried the original Re-Akt in a large? I have found they fit on the bigger side and had a few guy who wear the 4500 in an XL try the Re-Akt in a large and loved the way it fit.