hey guys just did my Belts and pump, found the cover that goes around the cam sprocket difficult to put the bolts back in had to buy new ones that where a little longer. any way dunno where to find a part number for it i posted a pic so ya know what i'm on about.

 

I think it's 944 105 189 04, "Toothed Belt Covering." If there are some junkyards near you I would suggest that. Get it used. Or contact larts_porsche_parts on eBay and ask about the aluminum camshaft sprocket cover behind the distributor cap.

Good luck, welcome to rennlist.