Hello from the U.K

I'm new to this game and looking to rebuild a 318 L.A with a blower for around 500hp (at the wheels would be nice).

As I'm in the U.K theres a lack of information on these kind of builds and even less availability for parts.

If anyone could recommend any parts websites as google results tend to return BMW 318 related pages.

If anyone can recommend some already proven mixtures of parts to achieve this goal that would be fantastic.

I've come away from off-roading so will be using my 2000 Jeep Grand Cherokee WJ as a platform and going RWD with it.

Any input is appreciated as I'm regularly finding sites that might be able to help but my location doesnt allow me to view.

Thanks

Liam