Sorry to hear about your predicament. Sadly, collectors are still collecting them for our hobby, wholesalers are still bringing them in, retailers are still selling, and people are still buying this species (and any sharks) that is totally incompatible for most captive husbandry.
I doubt you will find any hobbyist that will take this fish or can accomdate it. I know public aquariums will not take in people's stray fish (for many reasons, one of which is introduction of disease). Your best bet is to contact a big local aquarium servicer/installer who can perhaps find it a home in a very rich person's big aquarium. Lots of people who own these big installations seem fascinated by sharks, so there's a glimmer of hope there.