Recommendations for dog hammock/seat cover

I bought some generic XL size dog hammock for my Sierra EV off of Amazon. Made for large size SUVs and full size trucks. Given how spacious the Sierra EV is back there, it’s still not a great fit. The distance between the back seat and the front seats means it still droops a bit and the headrest ties aren’t spaced quite wide enough. Anyone know of one that fits well?