Hi Tom.  Our friend's '88 had the same problem.  They cut out the 
original screen, and unpicked all the stitching that held it in 
place.  They bought some new "no-see-em" netting and stitched it back 
in place by hand.  It was tedious, painstaking work, but it looked 
great when they finished.  It cost just a few $$$ in materials.  The 
"no-see-em" netting is available through tent/outdoor outfitters, and 
is more flexible than the original VW plastic netting that cracks in 
the cold.

Hope this helps,
Harry.

> Has anyone had any experience replacing the screen on the front of the
> Westy tent? It is the horizontal white plastic piece which has a zipper
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Harry Yates, Langley, BC, Canada
'90 Syncro Westfalia www:   http://www.bcit.bc.ca/~hyates
'87 Golf Diesel      email: hyates@bcit.bc.ca
'91 Miata (Millie)