Hybrid trike from PSA Group
 

This has four wheels, but the rear wheels are mounted far enough inboard to consider it a trike. It will do 40mph on battery power or 80mph on full hybrid power, according to the article. Alas, no plans to import it to the States. More at the link.
PSA | Automaker Unveils Diminutive Hybrid 3-Wheeler | Alternative (EVs, HEVs, FCVs) content from WardsAuto
http://wardsauto.com/site-files/ward...eu-live-17.jpg

Leaning three wheelers like the Toyota i-road have promise.
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https://www.wired.com/2015/11/toyota-iroad-test-drive/
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I don't see the appeal. But then, I'm skeptical about the performance at the edges of the envelope, like a crosswind in an off-camber corner.

Leaning three wheelers like the Toyota can have the super aero minimal frontal area of a a two wheeler with an enclosed cabin. 300 mpge at 70 mph would be feasible with a truncated streamlined design

I don't like those leaning trikes so much, but the drivetrain project seems interesting.

oldtamiyaphile — User name checks out.

Okay, with the out-riggers for when you turn turtle it might work.

Finally found something Amazon does not have: Tamiya RC Dancing Rider Trike
GREAT TIP!! Thanks oldtamiyaphile!