Dog car hammock

[PositronicRay]

I've had a couple of these, very good too, but let down by flimsy zips.

Anyone with a recommendation for a sturdy one? Bonus points if it has a stiffener for the side flaps. For use in a convertible so the extra straps that go around grab handles are superfluous.

I saw this one on the web with press studs and window sucker which may be possible.

https://www.carmats-uk.com/p/dog-hammock/