A couple years ago RRocket suggested Shift Kevlar reinforced riding jeans which I wear on occasion and fortunately did not get to test.

However I needed something for the office and the shift were definitively too casual for that. I found these on the web
http://www.dragginjeans.net/product/chinos%20for%20men. They sell for $200 Cad or $175 USD and they allow you to choose your currency

Guess which one I choose.

Ordered them Thursday night and they showed up at my door on the next Tuesday morning. Very well made, look as least as sturdy as the Shift, comfortable and look good enough for the office.
Just tought I'd share...