Thanks IMCF. I didn't realize that the Game Gear is 25 now... Man, do I feel old now! I was starting high school when they came out. I wanted one so bad, too.
So, it looks like everything has shipped out. ETA on the last part (the screen) is the end of the month. So it looks like I have plenty of time to finish body work. I'm trying to decide if I want to go with tact bumpers, or if I should try to modify triggers from the 360 controller I've cannibalized. I like the idea of the triggers, but it may be tricky figuring out how to mount them in a way that they don't interfere with the components that are more mandatory.