Dig out an old (or new) Bic lighter, and dismantle it. The spring you want is under the flint, and pushes it against the wheel.
Stretch it out a bit, cut a length that will allow light pressure to push the pin forward, and have at.
If you don't particularly like the idea, use it while the two new ones are on order from Ruger. (one and a spare, so that you won't need the spare)
Cheers
Trev