Shultz and Larsen .22 Firing Pin?

[52 Ford F1]

I have a Shultz and Larsen M70 target rifle. Some time last year, I was shooting and the firing pin broke off about 1/4" in from the bolt face. I took it apon myself to make a temporary fix by using a pop rivet stem as the missing half of the firing pin. So far I've ran a good 600 rounds through it with literally zero misfires. Anyway, does anyone know where I can get a firing pin? The best I've come by is the whole foward half of the bolt with a firing pin installed for an unreasonable price (plus shipping for Europe). I have no problem using my current "firing pin", but would prefer a proper replacement.

Thanks