This is what I would do....
I would have a good gun smith look at it.
I would replace any springs and keep shooting it.
I would have a good gun smith look at it.
I would replace any springs and keep shooting it.
What is a good source for the springsJust the recoil spring.
Parts breakages on these pistols are pretty rare, and it is hard to put a round count interval on any individual part other than the recoil spring assembly, which should be changed every 5k rounds due to loss in spring pressure more than a worry about the guide rod breaking.
I would keep a spare of every spring in the pistol, just to have on hand, but I wouldn't replace them at 10k round intervals. If the worry was about a part breaking on a defensive pistol, the best spare part you can buy is another PPQ. Put the brunt of the rounds through the first one, and only shoot the second one enough to prove it is reliable. Carry the second one.