Hi guy's I was going to fit a Laguna splitter but then decided to do this and save a few quid. Note the standard black lower bumper splitter in the image below.
It took 10 min's to measure and mark out and another 10 min's to cut out, file and sand(120 grit to remove a few plastic burr's) and I'm well happy with how it turned out. I just came up 20mm from the bottom and down level with the lower grill, the tools I used are below apart from the 2 pence that I used to mark the radius( The wife took that back off me).
More pictures on page 4 of the wider version.
Just remember if you do this you can do what ever design you like very quickly I know it's cheap ass! but hell we are in a recession. Have fun Rez.