Well, if you read what you write, you refer as to where to get a discharge tool.... Re-read that post of yours, and see if you dont come up with the same conclusion. lol. 

so instead of it saying this: "As to where to get one, I do not know."

It should say: "As to where to get a flyback, I do not know."

Because the sentence immediately above it, reads this: "A discharge tool usually takes care of the problem."

So, Unless you re-define the noun at play, it is assumed the following sentence "one" refers to the noun above it.