AndreaD. said "Go to Amazon and type in "doorbell for deaf" and doorbells (both wireless and wired) will pop up with ratings, options for volume, lights, up to 36 sounds.
Check out the reviews, go for one with lots of recommendations.
That is my suggestion.
I know everyone is about "shop local", but I don't know if Brandon has anything that would meet your requirements while meeting your budget. Besides, shopping online does support the postal workers and businesses too. "
Sometimes you just can't find what you need local.
But I would try calling the local home care/mobility supply stores to see if they got anything.
Brandon Mobility and Rolling Spokes. I've bought stuff for my special-needs kid there before.