Thanks for the info but I have found a pair of these free skating blades yet.
curious though. Whats the difference between the old style GS and the new ones? Hmmm I've just realised my patch blades (80s era silver tests) are also sized in 3rds.... but I don't think that's the change of which you speak...
Did you try in the US? You may need to call some of the old, established shops. You never know what treasures they have in their stock rooms. I'd start with Mike Cunningham at Skaters Paradise in Waldorf Maryland, and rainbo sports outside of Chicago. Good luck!