Prada SPS01X Replacement Lens

So I have a pair of Prada SPS01X's... I wear these things religiously and I work outdoors. As such... the lenses have gotten pretty scratched up. Does anyone have any replacement lens suggestions? Ive been looking at the MRY lenses... might try gold mirrored so it'll match my GShock thats is accented in gold (obviously not real). Ive never bought lens replacements so I'm pretty much a fish outta water here. If I get a decent pair, I also have a pair of Carrera's that will need new lenses as well.