Someone posted a list of the actors and the cons they were signed on for at the time. I don't know where it would be. Perhaps someone else has more skills at searching and would repost for you.
I understand your frustration. Most of the cons don't make it to the Pacific NW and those that do don't have enough of the cast members for me to take the plunge. I threaten I am going to head to Georgia for Walker Stalker con but I know my threats are idle with a full time job and kid in college. Goodluck!