The BladeForums.com 2024 Traditional Knife is available! Price is $250 ea (shipped within CONUS).
Order here: https://www.bladeforums.com/help/2024-traditional/
I have one marked "Ontario 2-80" which I probably bought between '80-'82 and it is 3/16's. I don't think they were ever made in 1/4in.