11 year old hermit crab needs a home

I took an 11 year old crab that was a pet that belonged to a patient of mine who went to hospice because she told me her biggest fear about dying was no one would take care of her crab. He had been living in a bird cage all 11 years she had him. He ate celery, carrots, fruit, eggs and Fritos.

I got him a bigger cage, read on the internet all the things/food/green sand they need and bought them all. (He gets air popped popcorn instead of Fritos now.)But I don’t want him. After she dies I want to find him a good home but I haven’t had any luck finding a hermit crab rescue or anything similar. I live in Charleston SC. Can anyone help? Thanks so much!