Hairspring end got out of where ever it was tangled, easily didn't it? Imagine or try doing this with the stud attached.
Where it still can use more sorting out is easier to identify from the picture, Picture of a new hairspring makes a good model.
I would rest for a while, let your mind come back to this naturally, before your second attack, one or two more attempts and you are very likely to have a near perfect coil.
Sort out as if you are sculpturing.
There is no secrete place for spare parts. What we can find on the internet, you can too. In many cases people uses donor movmment or complete watches. Beside, I never seen individual Seiko plated jewels for sale.
BTW, we have a section here where it's considered polite for new members to introduce themselves.