Any of the blowers out on the market now can be bought in kit form. This will include fuel pump, FMU, wiring, and such to make the blower work with your car.
Any additonal upgrades such as injectors and MAF is usually up to you and price will vary with injector size and MAF model. If your looking to stay in the 350-400 hp range, stock internals and such should be OK.....just don't get greedy and push them too hard