4516 recoil spring replacements?

So, I understand these are drying up; anyone know of a replacement scheme?
I understand a 20# flat wire will work with some finagling in a -1, but what for a -2? And for that matter, am I just SOL for my CS-45?
TIA, J

How about for the -2?

Yes,
-1 solutions are out there; I know about those; I'm really worried more about my -2s', which I prefer. I suppose the slide could be drilled out for the CHP guide rod, or the -1 rod, but am not sure it would work. Wolff never did make springs for the -2; wonder how Ismi flat wire for Colt Officers' would work...(EGW) 22#, though.
I suppose experiments with stock Officers' dual springs might be interesting?
maybe in the CS-45?
TIA
J