Hi! Glad to hear you're enjoying Simbuino, it's not as good at the real thing but it does its best.
Regarding your question, it shouldn't take too much work at all. You'd need to make a copy of the Simbuino.Emulator.LcdDevice class and update its code to simulate the lcd device in question, you'd also need to create a modified Simuino.UI.Lcd.LcdControl class to create a Windows bitmap from the raw lcd buffer. And of course if you want the user to be able to select which device they want to emulate then you'd need to need to tie all that into the app settings. But so long as you have a bit of C#/WPF programming knowledge behind you it should be relatively straightforward, and of course you can always post back here if you get stuck.