Replacement parts for Steyr Model 1913 (military conversion of Model 1909)

[justsomeguy]

Hello all,
I recently picked up a Steyr Model 1913 (functionally the same 1909), in .32 ACP.
While learning the pistol I realized that the barrel tilt assist spring is missing.

Does anyone have an idea where to get a replacement? I've already checked Ebay and just a general Google search with no luck.

I'd also like to pick up a couple extra firing pins since I hear these pistols tend to break them.

Thanks all!