Looks like Tony D at NewEdge Performance has a better price, plus he's a sponsor here on FocalJet.
http://www.newedgeperformance.com/suspension.html
He's got all the parts listed seperately. The "Pro System Plus" may be even a bit less, I'm not sure. All 3 components of the "Plus" package look to add up to $755 if my math was right. That's with the Sportline springs. Add $15 for the Pro kit springs.
Tire Rack ($715 on the site
) and Discount Tire (call for price) also carry the Eibach parts and good prices and are also sponsors.
As for using it for autocrossing, I have no personal experience. I remember reading a long time ago that a few people weren't that impressed with it, but I've also seen posts where people have been happy with the kit (though I'm not sure if they were autocrossing or using it on track for lapping days, etc.).

http://www.newedgeperformance.com/suspension.html
He's got all the parts listed seperately. The "Pro System Plus" may be even a bit less, I'm not sure. All 3 components of the "Plus" package look to add up to $755 if my math was right. That's with the Sportline springs. Add $15 for the Pro kit springs.
Tire Rack ($715 on the site


As for using it for autocrossing, I have no personal experience. I remember reading a long time ago that a few people weren't that impressed with it, but I've also seen posts where people have been happy with the kit (though I'm not sure if they were autocrossing or using it on track for lapping days, etc.).