Thanks nize for the link but I dont think that they have the same splitter I was looking for.
Finally I contacted this guy and he told me that this is going to get into production soon.He sent me some pics of his own 944.
BTW I bought from him the extraction vents which fit on the bonnet.
A very good aproach to extract hot air out of the engine bay instead pushing cold in and looks also great. I have not place them yet because unfortunately I didnt expect it needs alot of trimming. The air outlets dont exist as he sents it and you got to cut them one by one(!). Which is a hard job and lot of sanding.

If you consider the work they need to be ready to fit I think it should cost less.