Have you ever seen one on another tin top?  My Westy doesn't have this trim strip at all, but I suspect what you are seeing is shrinkage of the white vinyl "head bumper". Others with tin tops will know.  If that's the case (or even if there is a trim piece), it can be removed, softened carefully with a heat gun, and stretched back out. It will shrink again though over time, so use a little glue like Goop on it. You'll still be able to remove it later.

Stuart 

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Kk Al
Sent: Tuesday, March 07, 2017 5:56 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Desperately searching for trim piece

We are in the process of restoring our 87 syncro and have a few pieces we can not find.

We are looking for the siding door upper right corner trim piece.

See the pic linked here
https://drive.google.com/file/d/0ByeFv4TxLdX3X1U1dDJTcjRUaDA/view?usp=sharing

Thanks in advance.