That's pretty bad man. Well I guess KO is a no go from now on.
Have you tried calling Downing Atlanta directly? They still lost their contact info on the bottom of their website: http://downingatlanta.com/downingatl...s_info_new.htm
I checked the AA website and they only make supercharger kits for the 325i and up. I also searched Turner Motorsports and it does t appear they have anything. Supercharged 318's Arnt very common anywhere, let alone Australia.
A more common option is to drop in a 2.8L engine and mod it, then supercharge it. A 2.8L engine is gonna be a lot cheaper then a supercharger. Was your goal to have a fast car or be one of the very few people with a supercharged 318?