as i understand it, someone else was quoted about £550 just for the new screen, pcb, buttons and lights, cos that's all lexus would sell, (with labour to remove and refit extra). i then looked around for a cheaper solution.
the site you gave the link for shows the american model (time and temp on opposite sides, and all buttons swapped round), plus the unit is different from the one in my car, and one of the bulbs is different. (there are three kinds of bulbs, although lexus reckon there are 8 in total, whereas i had 7).
based on what you've said i'll ask lexus what today's price is, and then i'll know whether i got a good deal or not!
i'm still happy with it tho! but it's odd that with all that screen, it doesn't show what the outside temperature is.