Krell Resolution 1 parts

Hi all,

I picked up a pair of Krell Resolution 1 towers with an issue. The 4" midrange in both towers are dead. I pulled 1 out to test them and hoping I could find the supplier name, that's a no go since they are a sealed 1 piece can. By any chance would anyone know what brand supplies Krell drivers? 

As you guys may know, Krell is going through probate court and should be opening up again soon (hopefully). But it would be nice to go directly to the supplier and buy parts for a little bit less money.