I'm not sure if this would be of use to someone but I have a Rover EFI onboard diagnostic display for sale (the three didgit code display). You would need to splice it into your existing wiring harness if yours doesn't have one already.
$40 (what I paid for it) plus actual shipping costs from British Columbia, Canada
(http://i697.photobucket.com/albums/vv335/cgill/Rover-diagnostic.jpg)
P/M sent
SOLD!