DW 5000, Iron cobra or Eliminator. If those are too expensive brand new, try getting one of craigslist. A used pedal like those will be a whole lot tougher than a cheaper brand new pedal. There should be no reason why a used pedal is rusty or broken because they always come with cases. However if you do find someone selling a "used up" pedal and it doesnt feel right, don't buy it.
I just converted 200 euros and found out it's enough to get a power or rolling glide IC twin. However, it seems like a lot of stuff is expensive in the UK.. In fact I can pick an IC up here for $130 cheaper than getting it through an American site like music123. Even though the Canadian dollar is puny in comparission its still $30 cheaper before converting.