I looked at doing something similar but settled on a bare and elongated stick for the time being. To make the gated look work, you need to fasten the gate to the gearbox and not the gearbox cover as the gearbox moves a bit with engine torque. Making an alloy box with a gated top that fastens onto the shifter housing would be pretty straightforward. Note that the standard gearbox cover is some 2" above the gearstick pivot, so that would have an impact on the final effect.
Some photos of my finished install are in this thread:
http://www.talkmorgan.com/ubbthreads.php/topics/643635/shifter-relocation
