I am the biology manager at VIA Aquarium in New York and we are hoping to set up a new cuttle fish exhibit. I am looking to see if anyone has juvenile or adult dwarf cuttles. If anyone has or knows anyone who is selling please let me know!
You may have some luck reaching out to the MBL in Woods Hole MA. They occasionally have cuttlefish and other cephalopods for sale. I don't think they have any juveniles or adults right now, but they have some small new hatchlings, so if you are willing to wait a month or two you may have some luck.
Bret Grasse is the director of the Cephalopod facility there.