Fortunately, Tele 12au7’s aren’t the holy grail of the 12au7 family or nearly as coveted as Tele 12ax7’s.@mozartfan Look into the Amperex Bugle Boys. They are less expensive. There is a military version called the 7316 which is the one to get.
As with any tube, results vary from tube to tube. Make sure you get good ones and that you can return them if noisy or microphonic.