Like Steve said, Digi Key is the only way to order them. The original in my amp was a Magnelab. They are poorly built and according to Glenn, all of the Magnelab transformers have failed. Alpha was replacing them as late as 2009 under warranty, if I recall what he told me correctly.?
Anyway, my 99 is good to go and I am loving busting pileups again.? :)