Citation 23 Tuner Display: Where to get them?

I have a few Citation 23s around in second, third etc systems. A couple have dead displays. Couple of questions. 1.) Does anyone know to get replacements (I have tried all the usual sources including Harmon Kardon. Madrigal (aka just another Japanese firm) appears, on the basis of their web site, to have completely disowned Citation just weeks after all the remaining stock has sold). Maybe there is a lesson in here somewhere......like for god sake support Audio Research, CJ, etc before it is too late. 2.) Who is doing service on Citation stuff lately. Thanks!