How to get KT90s tested


Can anyone advise how to test or get tested EI KT99 tubes/valves please?

Jadis when I returned my integrated for a power supply repair claimed they were faulty and sold me KT120s at €120 on the basis they wouldn't warrant the repair.

The KT99s were great and I'd like to confirm the Jadis diagnosis.   I'm in Europe but they're light enough to ship anywhere. 
128x128andrew31829
A resistor broke and a PS wire melted its insulation with smoke was the fail mode when I turned it on.  
It takes a bit of current to melt insulation on a wire! That suggests a short- I suspect the power tubes had nothing to do with it.
Do you have a local Audio shop or dealer (better if they sell tube gear)my bet is they will have a tester or know of one locally you can get them tested at.  
KT99's were rebranded by Gold Aero and I believe KT91's were rebranded by VTL. I have TT99's and KT99A's that are both Gold Aero. The KT99A's do say premium where the KT99's do not