As the front was going to need a re-spray, I bought a copy Version R Rear Spoiler from UP Auto, (the quality of these is second to none and at a cost of £140 + VAT good value as well)
I had the spoiler and the boot re-sprayed at the same time. Couldn't resist making some Version R Stickers to go on.
You don't need to re-spray the boot but, you may find that the original FTO spoiler leaves some marks where it has sat and rubbed over the years, some are worse than others to have a look first.
Also in case you are wondering you use the same holes as the original, so that helps.