For brakes your best source is Dr. Diff, however I am not sure if he sells Wilwood products. Note that Wilwood calipers are not all that good on the street if that is what you are thinking. While 4 wheel discs are a given these days, to be very honest good drum brakes (especially with discs up front) are fully adequate. There is at least one company out there that makes performance shoes for drum brakes as well. If you run good pads up front and good shoes in the back with a booster, it is going to stop pretty much as good as it is going to unless you go to bigger brakes and get good tires.
Everything is a trade off and many people have swapped to 4 wheel discs to find that they don't stop all that much better that before. Likewise, many people have rebuilt the stock brakes and used good parts and found out that there car stops way better. I understand wanting the booster as most people today are not used to non-boosted brakes, me included. I built my Cuda and didn't install a booster, it has 12" front rotors with Viper 4 piston calipers in the front and 11" rotors with Cobra calipers in the rear. It stops fine but the first time I hit them I was very concerned with the amount of effort it took but then realized I didn't have a booster, once I got used to it it was fine.