Hi box1, Tamiya's Dark Green is XF61 and Red Brown is XF64, but my swatch doesn't look to accurate. X9 looks closer to German Red Brown on this swatch.
I use Model Master Acryls. I haven't painted any German camo jobs since I switched to them. I used to use Humbrol enamels, Ochre #83, Red Brown #160, Dark green #30. Good luck.
"It is well that war is so terrible, lest we grow too fond of it."-R.E.Lee