Seal for Vampire gun bay panels.

Hi all

We are restoring / rebuilding a Vampire gun bay panel for a friend.

The panel orriginaly had a sort of canvas webbing seal riveted to the panel to form the seal between it and the aircrafts nose. This webbing is about a inch wide and I would recon was about 1/8 to 3/16 thick orriginaly.

The orriginal seal is damage and rotten, so requires replacemant, can anyone point me in the dirrection of about 8 feet of this product.

Thanks in advance.
Ritch and Max.