There are several. The products even come with attached scooter, so you don't have to search for one.

Then maybe someone could make a kit to turn a rented kit into a personal one.

When people get tired of riding their personal ones - you can buy them all up off craigslist, then rent them out and make a killing.

Obviously you could use a blockchain to tokenise the ownership as well. EDIT: Crap. Now got a brain bug.