Home Equipment Advice Please

Good evening all

I have a soon to be 3 year old son with ASD. He has outgrown his standard sized high chair. He currently is non-verbal and has no comprehension of sitting still on chairs or danger. To eat he needs to be in a 5-point harnessed high chair that he cannot tip over.

Does anyone have any links/advice/ideas about where I can purchase a special needs high chair?

Any ideas gratefully received. Thank you.

Cate