How tragic! I never ordered from him because he was so far south, but I loved looking through his offerings. I'm so sorry to hear of his passing.
As for the business end, I think you can go to the Lily Auction site and send a message to Lily Auction Support. I hear the guy who runs it, can't remember the name -- Mike Longo???? --- is very fair. Maybe he can see if there's someone else in the operation taking over when all the family things slow down. If not, I'm not sure what else he can do to help you, but asking is a start.
Maybe there's a partner of someone and they'll get back to digging and sending plants when things slow down for them.
Are you sure they have your money? If you sent a check or credit card info, did they cash it? Probably not likely, but some sellers will hold off charging you until they are ready to ship, but I think that's more common when you are buying directly from a bigger operation. Just a thought
Good luck.