Back In 1998, Jeep decided to launch a concept called The Jeepster, a vehicle with no roof or rear windshield. Since it looks like the chassis and drivetrain of the Jeepster is the Wrangler, We just need to make a new body for the Hopper Chassis which can be separated. We can call it the "Ibishu Hopster Concept" Or something like that. One more thing to note is that this concept was made in 1998, and the Hopper was made from 1989 to 2001, making its period time, in line with the hopper's production. More Info : https://www.supercars.net/blog/1998-jeep-jeepster-concept/
I suppose it is... would probably be easier to fit the Hopper to the 50's one then the new concept though as their body styles are closer.