Hi there!!!!
My oldest has Autism. Actually, the school diagnosed him. He is considered high functioning.
I found the vests on ebay. I dont believe they were terribly expensive. You can tell they were hand made. the lady asked for sizes and let you pick the material. The weights were sealed bags of dry rice. in the inside pockets.
It didnt seem to help my boy...go figure!!! .
Good Luck!!!!! Hang in there!!!!!
MM