Help! My San Marzano seedlings are suddenly looking awful. Brown spots on leaves, then leaves crumpling/wilting. They're still inside and had been doing well along side my cherokee purples and brandywines.

So... I'll need a source for buying plants if they continue to croak. Does anyone know where I can buy them in SE WI or NE IL? Secondarily, do you know of a mail order source? I was really excited about growing this variety this year.