Some medications can be compounded into a paste that you can apply to a cat's ear. :-) It might cost a little more, but you'll save a lot in terms of stress - yours and Maui's!

Ask your vet ahead of time and see if that can be done.

Would he stay in the bathroom while a hot shower is run and get a good steaming? That may help...especially if you have a vaporizer running and can put some Vicks in it.

Good luck!