Definitely look at private schools and speak with an advocate or lawyer about mentioning "out-of-district" placement in a meeting. If they are unable to accommodate the child's needs in the school, the district much place the child in the least restrictive environment. Someone knowledgeable about your state's laws should be able to word this properly. "out of district" placement is expensive, especially when they need to provide transportation on top of tuition. Have a school or two that would be appropriate and have the lawyer/advocate send a letter or give you the wording for a document or meeting.

I'm guessing if you push hard enough and will cost the district enough money, they will magically find the time to try the "fade-in".

In the meantime, actually research schools that are more flexible. The therapist should be able to help there. You never know when you might actually need one. It sounds like this school is not going to help much...