Where could I buy a van with an electric ramp installed?

I have a handicapped brother who is in a wheelchair and needs a van with an air conditioner unit that works and that already has an electric ramp on it as my brother doesn’t walk, and is 29 years old. The van my parents had was old and the air conditioner didn’t work. Please if anybody knows of a van or car lot that sells these vans let me know asap. Thank you sooooo much! Anywhere in Fresno or Hanford Ca. would be fine.