The stuff I use is always Grodan, do they just make the material and whoever wants to can make the cubes? I have some 1.5 cubes that are wrapped and some 1.5 cubes that are in a sheet and the ones in the sheet are considerably tighter.
ahhh the days before the internet! It was a catalog world then. Use to get excited when a new sears , Brindle's catalog would role out. Went to the lego section first. High Priority back then ya know!!