These are special tungsten wire that have special ends on them to hold in place. I have some of that wire, but do not know how the ends are made to make replacements.
I doubt that you can find parts for these units.
If I may suggest you can go to a craft store and buy .ooo45 guage stainless steel wire. It will conduct electricity at the top of the there are 2 spring loaded capsules. remove the 2 bracket screws and you will find a spring in each round cup with what looks like a bicycle handle bar for a lack of a better discription. Cut old wire from the connectors and tie very tightly square konts to the connectors. Tie one side first slip it through the top insulated sleeve install one of the beads run wire down to bottom of unit through bottom insulated sleeve then you will take bottom hi voltage bracket off run out the other side through bottom insulated sleeve install last bead and run up to top through the insulated sleeve and tie wire to the other connector. Make sure when you are done that you have unit somewhat pieced together, because what you are looking for is the 2 springs should be about 50% compressed equally. I should mention one every important thing, There major dissasembly of the unit. If you think you can do the job go for it. Be warned the unit wil be in alot of pieces to string wire. Hope this helps.
WARNING! Besides the obvious one of UNPLUGGING the unit before disassembling, be sure to DISCHARGE the high-voltage and also DISCHARGE the big electrolytic capacitor(s) on the main circuit board at the bottom (temporarily short the two pins together with a small INSULATED screwdriver blade, three times). The first time will produce a big spark and a loud bang, the next might produce a smaller spark and softer pop, third time should do nothing. Failing to discharge the system will cause a startling electric shock from energy stored in the circuits if your fingers touch the charged connections accidentally, so beware and be safe. There's well over 100 volts stored in the biggest filter capacitor, and it bites hard if you're not careful. Forty year veteran electronics technician here. This tip will just be a review or refresher for those who have worked on TV sets or done component level repairs in computer power supplies, etc. before.
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