The North Face [FONT=Helvetica Neue LT W04_77 Bd Cn]Men's Paramount Peak II Convertible Trousers, [/FONT]have done me very well. Used them for beating two or three days a week, a week or twos hiking, holiday and conference travel and a few days stalking in the summers for over 12 years. I spent £6 on a new zip last year.
My original pair are in charcoal grey but last year they started doing them in Green. I posted on SD that the green ones were on offer at half price a few months ago, but they do not appear to list them on the main North Face site any more, just the charcoal and beige ones...you might be able to pick up old stock green ones elsewhere.
If you are 33"-35" waist I might be persuaded to let you have a pair that I stocked up with...At almost pension age it was slightly over optimistic for me to stock up with 2 extra pairs on top of the one I bought last year....if the originals last another year or two I have over 60 years in hand!
Alan