Most of the common layers are in the How to Paint guide they sell (the one with the DVD), or in white dwarf weekly now with each release.
Most of their schemes though go base, shade, layer which is a peculiar way to do it as they darken the base to apply a lighter layer?
Surely it should go Base, shade, base, layer.
Most are easier to judge for yourself using the colours, like the example you gave they are sort of designed in small groups.
If there's a certain combination you're after I can look in the book no problem