Ebikes.ca has a hub motor with integrated IGH.
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My Luna Stealth has a mid drive, but an internal 3 speed gearbox. I love the belt drive, because I carry the bike up and down the stairs to my condo, and it means I don't have to ever worry about grease getting on my clothes or anything.
That is definitely nice! Belt drive sounds pretty nice for sure. Also an internal 3 speed sounds like a perfect number of gears.
The priority current ebike has a mid-drive belt drive with an internal gear rear hub shifter -> https://www.prioritybicycles.com/products/current
Not sure this is what you are looking for, but I have one and I love it. The belt drive does not wear out like a chain.
Totally forgot that belt drives were a thing honestly lol but that sounds pretty sick! I have heard that belt drives are not quite as efficient as chains at delivering power which can be important if you’re low on battery or something. Is there a noticeable difference for you between the effort you give on a belt drive vs a chain drive?
Yeah if you run out of battery it kind of sucks, but it will still get you home. Unlike a broken chain.