Where to get power supply's?

The only one out of your links that could possibly work is this one: Allanson Neon Sign Transformer 7 500V 30mA 120V Advertising Beer Neon Sign Part | eBay

And that's only if you can actually remove the GFI. On my NST's the GFI/OC module was mounted next to the primary input terminals. They generally don't embed the GFI in with the transformer itself, but it's possible.

Got my stuff today. Didn't get home until almost 2AM but the first thing I did was build this:



Only took me like 30 minutes to gather together all the stuff and put it together. All I had that was small enough and straight for the rails were some pieces of bus bar. One copper and one aluminum. Might have to get something bigger. That index card is to cover the spark gap because its pretty bright. Unfortunately these things are extremely loud (I remember from my first try) so I cant test it at 3 in the morning.

Also I bought that nst

pics of my build. all i need is my power supply. already contacted someone

The arc electrodes need to be elevated slightly off of the capacitor plates as being in close proximity to the dielectric will rapidly degrade the dielectric due to coronal heating. A couple mm is all that is needed.

how do i elevate and maintain contact? also thanks for pointing me towards the power supply.

Generally aluminum angle is used for the electrodes and one wraps wire around the base side in order to "prop" up the arcing edge.

its not entirely done. im making a wire coil to connect the foil sheets.

I've just built a 20kv 500 watt power supply for a CO2 laser project of mine, I wound my own flyback for it. You could do that for the 6kv, or use a cockroft walton voltage multiplier on the end of something like a microwave oven transformer or high voltage plate transformer.