I recently installed the KTM Map switch from the KTM parts catalog. You get 2 settings, standard and 'other'. The 'other' is either the mud or fast setting, depending on what you have set on the stock selector switch. So you either get mud/standard or fast/standard for your two settings depending on what you have the stock selector set to under the seat.

Real easy install as well.

Link for map selector at ktm-parts:
http://www.ktm-parts.com/76039974000.html#.VBkeWvldWHA