I am local to Disneyland and honestly have not found any that are as great as Gold!
But, I have used Deckert Surgical several times for wheelchair rentals and they are very nice and always delivered quality wheelchairs.
We tried Cloud of Goods for a
scooter once at Disneyland and it was a disaster. I refer to that scooter as a "Frankenscooter" as it looked like it had pieces from several different types of scooters all mashed together to create one. It held zero charge and we had concerns about getting back to the room more than once with it. When I contacted them about a replacement, they were unhelpful and would not (or could not) get another one to us, so we had to make do with the terrible one.
I see a lot in the parks such as Anaheim Scooters, Select Scooter Rentals, and One Stop Mobility. We have not tried them, but if we were to do a scooter, we would try one of those. We bought a wheelchair instead though, so no need for one at Disneyland. Like WDW, Scooterbug is the only one allowed to drop off at the Disneyland resorts. I think some of the ones I mentioned above are along Harbor, so you could grab from there and then scoot over to the park.