Remington Model 7 firing pin spring?

[flytie]

Would anyone have an idea where to source a replacement Remington Model 7 firing pin spring, preferably an upgrade to the factory one?

I do know that PTG and GreTan sell them in the USA, but they will not sell to a private individual in the UK.

TIA, Simon

 

[Smellydog]

What's wrong with the original one?

 

[flytie]

I'd like a spare.

 

[Smellydog]

Okay.
I don't think I've ever had to replace a firing pin on any firearm or heard of it.
Probably why I'm not understanding, .