D-Hive Shortened Length - Unbeatable Durability SUV Air Mattress for Car Camping, Durable Extra Thick 300D Oxford Fabric, Quick Easy Set-Up w/Electric Pump, Car Mattress with Base Extenders 180cm

Probably not as Temu cheap, but I recently tried this one and it fits perfect. Comes with a couple blow up seats to place on rear seat floorboard to keep the headrest level. Its the "shortened" version of the options here. https://a.co/d/0hQsiNM0 Also, layed one of those lifestyle folding tables in the cargo area which perfectly levels the rear.