Needed: Shasta door trimmin's replacement.

I know I probably have not done my due diligence yet in trying to find this.  It is the inside trim seal of the door, used on the later-60's and 70's Shastas.  These would be the doors with the "waffle" pattern in the aluminum panels inside and out.  I have the door apart and reframed, but hate to put the aluminum pieces back together to finish it without replacing this seal trim.  Tough to get a good photo of its shape. 

This is the interior of the door...this stuff runs on three sides of the door, attached to the aluminum outer frame.





Any ideas on where to find it for sure would be appreciated.  I checked VTS but did not find this.  Might have overlooked it.