Some of the ones I've seen on Amazon would be able to be mounted into a fiberglass radio blank-out plate but I'd have to get a friend to help with a CNC program for the cutout (I have a different CNC router machine and it uses software I haven't learned well enough yet). I think it just depends on what you want it to look like and where you want it to be located. But you need to read the specs before you buy. A friend bought one of these for a Jeep and thought it would be a good answer but it works only on 5v dc input so he had to also purchase a power supply. Just saying you might check the power input specs...he didn't and also didn't realize I could make him a dc-dc converter. If you go that route, let me know if it is 5v only. Most of the ones I've seen are.
Below are some images on the fiberglass work I'm doing with the radio project.
~ Jon 1952 1/2 ton with 1959 235 | T5 with 3.07 rear end