Hi Meg--I have quite a few special needs links here:

https://askatechteacher.com/great-kids-websites/special-needs/

But I don't see any for a curriculum and only one for autism. My go-to resource on this topic is Carol Harpold over at OTs with Apps and Technology:

https://otswithapps.com/author/csleynse/

She might offer some ideas.

Good luck!