Double sided 100lb card stock for Epson R3000

Hello all,

I'm looking for a double sided 100lb card stock that will give good results with my Epson R3000. I've tried a few so far (Classic Crest, LCI paper) and the result is always super dull and dark colors. The R3000 prints beautifully with both Epson and Red River papers (when using the Red River printer profile) but these brands don't have what I need and I haven't have any luck with any other card stock.
Any tips on papers or on how to get better results with non Epson matte card...

Double sided 100lb card stock for Epson R3000