well can only go on the rough quotes i got, as soon as i found out rough figure of at least 4K plus i didn't look any further, how much would the selectecor forkes be? and building a box for that cheap? well dunno where you went cos i got th3e same figure from about 5 different companies as far as fitting and building the box.
and would you want to be driving all the time having to ram it into gear even if going slowly?