Anything can be done if you want it bad enough. You can put fabric over the plastic panels with no problem, but if you want a different desighn the use of alot of foam could make the doors look obese. Anything can be done within about an inch-1.5" and still look good. Just use adhesive like you would on any other panel and fold around behind and use adhesive there as well.making one from scratch would give you a bit more of a chance to customize to your tastes with desighns and shapes and custom armrests etc.
HK