Please help replace our sons things from car fire

Please help us replace our terminally ill boys belongings after the arson attack on his disability car on Christmas Eve

 on Christmas Eve our 5 yr old son kadens disability car was petrol bombed inside and out while we were putting him to sleep,it was a very scary time for all of us,kaden has a rare heart condition called critical aortic stenosis,and has a tracheostomy fitted to help him breathe,he also has a gastrostomy fitted into his stomach to feed him,unfortunately we found out that motability insurance doesn't cover anything that was left in the car,our sons car seats,sat nav,CDs,iPad,Nintendo ds,roof racks and box,everything has gone,we