Paul;
Thank you for your response.
I do not believe this model will work as it does not have a bottom cut out like the top one on the screw end. The bottom needs to go over the screw that tightens the channel & assembly together.
I suggest you look closely at the bottom of the assembly on the screw side to see what I am talking about.
I have done some additional research and I believe the sliding door is an Anderson, the model from 1975 to the early 80's called a Terratone.
If an assembly has the dimensions as described with the U cut at the bottom, it may work.
Thanks for your assistance.
Phil