Christ on a bike. I just looked for you.
http://www.ebay.co.uk/sch/i.html?_trksid=p5197.m570.l1313&_nkw=rover+25+light+cluster&_sacat=0&_from=R40
Should cheer you up
Should be able to get a light cluster for about 30 quid off eBay which will mean your rover would be worth about.....30 quid! Ha ha ha...
Did that cheer you up