[Tigers] Tonneau doesn't quite fit

[Rollright at aol.com]

Hello,
 
Over the years, the tonneau that I have has shrunk a bit. 
Using it jeopardizes the male fasteners on the body and actually just
won't quite fit.  Worst spot is the pair on either side of the zipper  under
the windshield.
 
Are there any techniques anyone knows to "stretch" it just a bit?
It seems so wasteful (and expensive) to buy a new one...
 
Happy New Year to all,
 
Jim  Armstrong
Mk 1A 
382002083
LRXFE
TAC  0763