Marfla, I used Ride-away to have the hand controls installed on my car. They are experts in van conversions etc.
www.ride-away.com They have many locations on the east coast. Give them a call, I'm sure they can direct you to a local vendor.
You can always rent a scooter from
www.scootaround.com. I usually rent a scooter when we fly so I don't have to worry about transporting the scooter and/or having it damaged by the airlines. I've also rented from scootaround for a cruise.
Hope this is helpful. Betty