Ethan needs a new wheelchair

Ethan is almost 8 years old. He suffers from severe autism, severe ADHD, severe Sensory processing disorder & severe & profound learning disabilities.
he sleeps in a special bed and has a fully padded bedroom. He uses a wheelchair everyday to get to and from school & go out .
his wheelchair is currently broken & is desperate for a new one.
A new wheelchair will last at least 5 years and costs £2000.
unfortunately and unfairly Ethan is not able to receive any help with a new chair from the NHS or council.
We would much appreciate anything to help Ethan get some new wheels
thank you