I also had a mac1 but to be honest i thought it was great.
I used to do car valeting so i used it everyday for about a year with no problems until one day the lance broke and started to leak, although the washer itself still works fine, so i thought i would try and get a new lance from...
http://mammothworkwear.com/search/dickies-work-trousers
they have a big range of trousers all sorts really dickies,timberland,cofra,caterpillar give them a wirl
or there is ebrookes as well