Steve, Recknagel is indeed the go. And Peter Van Meurs at Pro-Cal is your man. BTW, your current rear sight is a Recknagel - ERA is their mark.

For the rear, you want a #15400-3036 sight [one fixed, 2 folding] and #16030-3036 [sweat-on] or #16037-3036 [screw-on] base.
And the leaves will all need to be filed in, of course.

For the front, they offer both fold-over and flip-up night sight options. The fold-over are integral with a plain or banded ramp, and have a 2mm silver normal bead and a 4mm white night bead.

Plain ramp is #12100-0000, banded ramp #12105-0185 for your barrel [18.5mm diam.].

Flip-up - there are 3 variations, with different lengths and night bead diameters, and plain and banded ramps in several heights and styles. I can't go into detail here, as that section of the Recknagel catalogue is all in German - the other sections have some English.