if you have access to a welder you can make your own, all you do is mark the flat angled bit of the shifter,cut approx 1" out of it with an angle grinder and weld it back together again.if you have doubts about your welding get someone compitent to do it and weld it both sided,grind it flat and re-paint it.
if you do that and fit the weighted shift rod and the poly bush that matey sells at the top of this page,you will have fab gearchange..........