This is a project that I finished 2 years ago on my personal boat. I think there are a few out there that want to install larger screens on your 38/40 pop up console. I managed to fit 2 Furuno TZT2 side by side, these are the 12" screens. I cut the existing face all the way to the side walls. Then I made a "adapter plate" from coosa board to widen the available face area. I also had to cut some of the main console to allow the extra width to clear while opening and closing.
**** that looks professional from here. How do you like the tzt2s? I have had mine for a year now and I like them.