There have been several iterations of this SEGA handheld released by AtGames over the years, and I always thought they looked soooo close to resembling the Dreamcasts’s VMU device. Thought I’d post a mockup.
These handhelds are decent for the price. They have a good screen, rechargeable battery via USB, some built-in games, and an SD card slot so you can add some more games. I never pulled the trigger on one because of their well-known sound issues.
However if they did release a VMU or Game Gear-styled version, that may be enough for me to buy one.
Bonus: SNK announced their NEO GEO mini this week (left). It resembles a “candy” cabinet that is exclusive to Japan. If they did release this in North America, I’m hoping they do a version that resembles their famous red and black cabinet (right):
The colorful arcade buttons would also be more faithful to the red cabinet.
When I did the red mockup I didn’t realize the shape of the cabinet was unique to the candy cabinet, so a North American version could be more boxy in appearance.
Dave's Geeky Ideas 
Love your items. Just saw the Star Trek Shuttle Tent. Do you sell your items?