I mistakenly bought a dual spring setup from sprinco, not knowing I needed a different guide rod and bushing.( guess I should have done more research ).
Where can I get a guide rod and bushing for this dual spring setup ?
Or what recoil Springs recently are doing the job and doing it well with the larger guide rod ?

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2 Cor 5:17
John3:16

The bushing was never a cataloged S&W part.
The guide rod (S&W 108620000) appears to be discontinued -
Smith & Wesson Recoil Spring Guide Assembly S&W 4013TSW 4053TSW

You could probably have someone like BMCM fabricate them.

There are two choices for the (-1) single recoil spring -

The factory spring (S&W 201330000) is also discontinued but still available from Cylinder and Slide.

Wolff 47716