if shifties count... I'd get a newer Malaguti Fifty, '94- '97 the ones with the g30 engine. Fred in atl imported one, thing rippps. 50cc 2t, Water cooled, manual 4 speed, robust clutch, mono shock, disc brakes, hydro forks, plenty of kits and parts around. They even made a dual variated auto version called the Fifty RV that was still stupid fast for it's kind. Or an Oxford Peripole, same thing as the malaguti more or less just more naked looking. I love the step through shifty / tubone concept. It's like a moped on steroids! The only thing like it nowadays is the Sachs Madass which is 4t and has zero sex appeal lol.
Hmm or the Cagiva Super City, they made a 50cc but the 125 is sick. Like a mini adventure bike.
my 2 cents you didn't ask for; consider serviceability and parts availability before you pay to have something imported. Know what you are getting into. If you plan to actually ride it, make sure you can at least get the important bits. Some bikes had very rare chassis designs but super common engines, that to me is kinda the best combo.