Sorry for resurrecting this thread after three years...

For those living in Europe, have a look a Brax business pants (e.g. Hirmer in Muenchen carries them). I just bought a grey Brax pants (wool mix), it has a (inner) zippered back pocket, great for securing the wallet. Price was about 100 Euros. It travels well, and I was told that it might also be ok for sink washing and air drying while on the road (not requiring pressing) - even though I did not yet try that aspect.