For anyone who might be looking for something similar to the Roadster V2, I dug around and found this thread:
https://electricbikereview.com/foru...s-miller-desiknio-urban-or-ampler-curt.30789/
The other two are much more expensive, but the Enki Miller also has a Gates drive and comes with a Bafang M500 or M600 mid-drive. It comes with the same size battery, integrated into the downtube, as the Roadster V2 and Luna Fixed (36v + 7ah = 252wh) so range would be at least as bad as the Luna. But according to their website, they're sold out. According to their Facebook, they'd really rather sell you a Billy, which is totally different. And finally, according to their indiegogo/kickstarter campaigns they were supposed to ship the Miller in June 2020, but they haven't posted updates since March. It looks like the OP of that thread ordered one, but disconcertingly nobody has posted anything to indicate they got a bike yet. It would be totally understandable if Covid delayed things, but the company going dark past the expected shipping date is not a good sign. As far as I'm concerned, that bike doesn't actually exist (yet).
I also somehow totally forgot VanMoof does exist and the S3/X3 weighs a little over 40 pounds, is sort of a similar bike, but comes with a much better 504wh battery for $2,000. They will ship it to the US, in which case you can apparently increase the top speed to 20mph. The X3 might actually be easier to pick up and carry because of the lower top tube design. It looks kind of quirky, which I like. But it also has a front-hub motor with VanMoof's sort-of-internal gear system in the back, both things I don't like. And, it isn't shipping until November/December 2020.