There isnt a WOS or Pup version of UnRAR3, I've looked myself and couldnt find one, there is a MOS version however

. I even spoke to naTmeg to see if he could do us one, but he doesnt do C++ which I think is the language UnRAR is in.. so...
However I do use the 68k version, which is slow but its okay so long as you remember to set the task priority of the shell your running it in to -1, means you can still IRC and UnRAR at the same time :-)