Sorry, I know some people have used the merc, eaton supercharger as a replacement, or when assembling their own kit. The mounting cradle seems to be the most troublesome to source.
Put some bg44k in with a tank of petrol, you will be surprised at the difference it makes.
http://www.ebay.co.uk/itm/BG44K-BG-44K-Fuel-System-and-Injector-Cleaner-/200786474899?pt=UK_Vehicle_Oils_Lubricants_Fluids&hash=item2ebfce7793
That picture wasn't what Adam linked to sorry. Just having a browse through their site and came across it. That was a jeep cherokee they did. The volvo boot with the none fitting boot carpet stood out too.
As you say why post dodgy looking pics on your own site??????? Hope yours turns out okay and the others are just because some cars are easier to convert than others.
Firstly welcome to the club, The noise to me sounds like exhaust manifold gasket leak, especially as it sounds louder when you move closer to left side.