I was more meant to illustrate the hugeness of the engine and not the blower. Yes, I'm sure its an M90.  The Later V8 models use the MP112-4. 
Besides, the cover doesn't cover the SC, it covers the liquid-air intercooler.   
Check it out, only $800+ shipping   
Here is an ad for the blower, with pics. The Aston Martin DB7 used the same supercharged inline six, but with less displacement and a bit higher compression and hp. See, tiny snout. 
http://i11.ebayimg.com/05/i/000/8f/54/ec58_1_b.JPG