The footpegs on the DR were attached to the frame via a bracket, so one could move the pegs up or down by providing a new bracket. On the WRR the pegs attach to the frame directly, so moving them is much more challenging.
Despite that, DRC used to make pegs that came in three different heights, one being 5 mm lower than stock, but these (along with the high ones) don't seem to be available anymore.