WTB rear windo gasket for '68 Valiant

Guys, I'm wanting to replace the headliner in a '68 Valiant, but, as many of you know, to properly do it, you need to remove the front and rear glass. Since my gaskets are original, I thought I'd prompt the group here to see if anyone has, or knows of a source for a rear gasket ?

Hey, I'll also make the offer that, if someone wants to 'donate', or make a generous offer on one, I'll post up a 'how to' so others can do the same to their cars if desired. Just thought I'd pitch it ~{:>)

Thanks for you help !

Southernman