Thiel CS3

Hi all, just got a pair of these vintage thiels with the soft dome Dyaudio D28 tweeters on the cheap. Found out after I brought them home that the tweeters do not play. They are dented in, was able to pop the dents out, checked all wiring and the solders are all intact. They still make no sound, tried to source these online, spoke to Gary at Thiel and was told new tweeters are 400/pair. Is there any anyone out there with experience in repairing these? are they repairable? appreciate any feedback.
I am going to chime in and say that it is a possibility that the tweeters are fine and it's the crossover that is the problem. I hope I am wrong and someone with much better insite can come to your rescue with a better diagnosis.