Import auto performance out of florida has a deal on the aluminum SPC kit for $229 US.
That's a GREAT price, even shipped to the UK.
Accessory Zone, not to steal business away from you guys with that plug, but you are contributing to the stereotype that SPC is way too expensive with the prices you're charging.
And Gee, to answer your question even more, the aluminum kit has camber AND caster adjustment and is only slightly heavier than stock. That's completely unique. Another plus, they use one huge nut to tighten everything down at 130 or so FT/lbs, so it's easier to adjust AND is more reliable than 4 tiny allen keys like most camber kits. The aluminum kit is also curved at the ball joint to give a more stock ball joint angle for a lowered car.