VB
becareful with the Sharpbuilt shrouds. I stay on the german/UK message boards and they do not recomend them.
Try this out for size...
A.Knuf Power Tunning Parts in Germany has an VW/911 fan set-up. The shrouding is pretty much same as BAS's but the unique part is the housing for the alt. is designed for a VW Golf alt to lower the cost, plus everything fits and wires up just like the 911 alt. You can buy almost 2 Golf alt for the price of 1 911 unit