Not sure what else you can try if he won't take the bonjella. It's hard when they hate that stuff. I've been giving Eleanor nurofen to help with the pain.
She keeps putting her fingers in her mouth as well when a tooth is coming. She has two more on the way at the moment. I know what it's like when they won't sleep during the day and they get so grumpy.

Hope you get to find something that will work for Aiden.