I copied Humps and got (think this is what it's called) a MaxRaxx. That was about 5yrs ago and what a great bit of kit it's been. Got mine fron GK motor factors on North Staion Rd. You may want to try Thule as they do some good ones too.
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'UnTrailBoss': Team Commencal, Yokohama Ditchfinder Tyres, Barrafuldi Goggles, Stadium Helmets, Hallman Leathers, SIS and Nostalgia Industries.