The spring is tiny...about 1/2 the diameter of a typical spring. The clip showing is from the PSI PrincessCan you just cut a refill spring to the size you need?
Not a bad idea but not really worth the time. But thanks...A gunsmith may be a good option.
The spring I used is from a cheapie. For some reason it was sitting in the desk pull out drawer.I've found the cheap giveaway pens at the local bank have a multitude of uses. Have you tried borrowing one and using the spring?