1969 model float away bifold door

We only sell two bifold door tracks: the 21-401 and the 21-450 (both available in alternate lengths). However these are really only meant for more modern applications and I can't be certain that they'll work for you. 

It would ultimately depend on two factors: the space where the track installs, and the size of the hole in the bracket. In the case of our 21-450, the track is 1" wide x 1/2" tall and its bracket has a 1/4" diameter hole. For the 21-401, it's 11/16" wide x 5/8" tall and its bracket has a 3/8" diameter hole instead.

Look these two products over and see if you could get either to work in this door. They are our best and only options, though neither one is a guarantee.