i have 2 grass pickerel, and as i was reading the post, i thought to myself, crayfish won't work... then i notice later it says one was eaten... sorry about your loss.
but CONGRATS on the pickerel ... i have only had mine for a week or two and i love them!!! very cool to watch them swim through top cover then dart out and attack guppies!
as for the people looking for some, i suggest Teleost... if thats how you spell his name... he is in chicago and has / had them for sale.
i got mine from Zimmermans, and they can be found on forum.nanfa.org , in the trading post section. 10 bucks each and shipping wasn't bad (they are pretty close in distance to me though) they are extremely healthy, and a great fish.
i also saw a post the other day in the for sale section about redfin, and i replied but the guy hasnt gotten back to me, so i cant say anything about that one yet...