Screen overstretched

I have an 88" Carada screen, and stupidly had left some items leaning against it while it has been in storage.
Now part of the screen material is visibly overstretched and somewhat slack. I know Carada has gone bust, so is it possible to either try and repair it using something like a hair dryer or heat gun, or are there companies that make replacement screen material that would be compatible?

Or do I have to bite the bullet and get a new screen? Itll be a shame as it's nicely made, and I didn't know if any of the new ones available in the UK were of similar quality.

Thanks in advance