Hello,
I know that on the Elise which uses the same engine, its 11/98 when the change happened, so if yours is a year either side of that you could take the chance that rover made the chaneg on that date, but it may depend on who Landrover/Lotus stocked stuff (if you get no other info)
Alternativley go to a LR main dealer with your Engine no and VIN and ask for a price for the part, when they quote it ask if its manual/automatic and get the rover part no to be sure then say ill think about it (bit cheeky) .
Side note, if you need a manual one then I have one that I bought for my elise but then engine was aq gonner and I now have no nbeed for it. Yours for £20 + postage (if you paypal) email david@homespotters.co.uk
Good luck.