Convertible boot track?

hey all.not sure if I have the wording right on this but I'll give it a shot.
I've ordered new boots for mine and my wifes 65 Valliant rag tops.
Hers is missing the track(I'll call it that) on the back of her rear seat that part of the boot attaches to.
has anyone ever had this part missing and had to come up with something to replace it?
Ted
Would you have a picture? Sgrip65