I understand that stormtroops wore trousers other than the feldgrau type, corduroy I understand?, what colours were they and was there a variety of colours of legwear worn by the stormtroops?. I already have the Osprey book, but I have developed something of an insatiable appetite (anyone understand that) for this subject and I wish to know much more about this subject.
The Windrow & Green World War One Infantry book has an entry for these troops that runs thus:
"M1917 trousers in field grey cloth, reintroducing this colour which had been abandoned in 1914. By this stage of the war the cloth was eaked out with ersatz fibres for economic reasons - even nettle fibres were used - and was of poor quality. The "Sturmtruppen" also used stocks of the mountain troops' special trousers; the elbows and knees were often reinforced with leather patches."
I don't know whether these mountain troops' trousers were corduroy, but it sounds like they wore pretty much whatever was available. No doubt courtesy of the blockade. The French army did much the same thing in 1915, as they made the transition from iron blue grey and scarlet to the only slightly less conspicuous horizon blue.
Hope that's of use; the only other thing I can suggest is an extensive photo search, which is something to do when the evening's TV is crap - again.