can't help with a mysid source but cuttlefish are so badass, very smart.
http://discovermagazine.com/2003/oct/feateye
http://www.youtube.com/watch?v=k-DusaSVHmM
what is your setup/method for housing a cuttlefish ?
is it possible to keep them with corals?
I think is would be too cool to have a cuttle fish in a large reef tank