There have been number of hacks to stock Insight, mostly in relation to its hybrid drivetrain, however this effort produced number of gurus and usefull "insights" into the electronics etc. In terms of full EV conversions there might be a couple of them, the best bet is Otmar, invertor/founder of Zilla/Cafe, he is prototyping 3phase controller on this very car.
Insight - Start here with EV Album Search
Insight forums:
PHEV Insight - Insight Central: Honda Insight Forum
(Peter has got other valuable threads around the internets, BVS etc.)
"Peter Perkins" Insight PHEV guru and formely of "Solarvan fame":
Home
Tri-Zilla Insight:
Cafe Electric llc
Insight Conversion
PS consider yourself one lucky chap as LHD Insights are unobtanium in the rest of the world as they don't have proper legal papers to be imported from U.S. anyway, grr..
(and the rest of them in RHDs have been already bought all by Peter, hah)