they are made of leather...so it seems by touch an feel ..so I IF IT WERE ME ..I WOULD contact Denny ..maybe he will make ya up 2?..now remeber by my profile IM far from stock ..I have power windows from a mid 70's caddy ...but at the end of the regulator the last 3" of the stock 52 arm is welded on including the roller for the window track.
and I do have 1 installed an works great..I would think ya just a bit big on your roller, remember it basically pushes up ..it does not need to fill the whole channel..gravity is always pushin down on it, so make a bit of room for it to work an lube it well ya should be OK.
