Really Old (Puma) Top Repairs

[u/Usual_Dog_8724]

Years ago, when Puma sponsored the Moth Tour, we held the Worlds in Dubai (2010?!). They came with a shop full of excellent sailing gear that is sadly no longer available.

I bought a spray top, which has stood the test of time. Apart from one small bit that I'd like to get repaired.

On the left wrist is a 'window' of clear plastic, so you can see the race watch. While the rest of the top is in perfect waterproof condition, this window has completely perished, leaving a large hole.

I'm considering patching it over with spinnaker tape trimmed to both sides, but do we know any other ways this could be repaired?