Nicopress Swaging Tool - Availability

I don't have a go no go guage in the box. My airplane only has 8
swages, none critical or significantly stressed, so it's not
surprising. Where do they come from and how much do they cost?

Then why do you have them?
Are they on control cables?
Are they "flying wires"

If any 1 popped.. would it overstress another? and would a combination of
more than 2 or more of the 8 letting go cause flight problems?

I do not know where to get the go-nogo tool.. but I would guess any aviation
tool / parts supply house would know.

BT