If its for a nova see this site,theese are the mounts i used to fit the XE in my nova:- http://www.valvers.com/partsforsale.htm
If its for a corsa or tigra ask on corsasport,there is a guy on there that sells the same thing but for corsas/tigras.
Ask on corsa-sports forum,theres a guy on there that makes and sells them to suit a corsa at similar prices. i.e. a damn site cheaper than PVD,regal,courtenay and the likes.
This is a link to corsa-sports forum:- www.corsasport.co.uk/board/index.php