Hi. A little late to the discussion, but DS2's OT was perfectly happy to organise (through WC Services) a Mac Major when DS was younger and this year a wheelchair for DS2. He doesn't need it all the time - in fact on regular school days, he doesn't generally need it at all.
He has ASD, ADHD, hypermobility, sensory difficulties, dyspraxia, as well as asthma that kicks in if he gets too physical. On short walks in quiet places he is fine. On medium to long walks, especially in busy, loud, or crowded places, he cannot cope and gets tired. We generally use it in the supermarket or when we are going to the high street or a busy shopping centre (especially this time of year!!)
The school knows he has it, and it actually lives in the boot of our car, as he doesn't need it at home. So if something pops up at school where they might need it, I can leave it for the day to use.
It's a bit funny, actually. DS2 is also a runner... just can't run that FAR mind you... far enough to get into danger/trouble or hide where either it's dangerous or you can't find him.
OT thought it was an interesting combination - a runner with a wheelchair. I noted, though, that he STILL tries to get away when in the wheelchair - by self-propelling! Guess that means he's a runner and a roller.
Goofy kid.
Anyway, back to the discussion at hand - WC services didn't have any issues with providing him with a wheelchair even though he doesn't need it fulltime. So if you need it, don't be afraid to request it through the OT, as a decent wheelchair can be expensive IMO (depending on your budget obviously).