The first comprehensive Empire kits featuring, not only the spacers but complete unequal length wishbones with spacer brackets and full spherical joints all around are going out next week, why not wait until the guys have fitted them and see what their reports are like? They completely eliminate toe change, and completely eliminate camber change, which the 'comfort' kit doesn't even address. As a by product, you also get adjustable camber and castor into the bargain. It's more money of course, but it is the complete answer.
Bill at Empire has had 20 kits made, and, frankly, I know they are causing him a bit of hassle, he may not want to do any more, and if he does, he mentioned that they would have to cost more because of the involved CNC machining on the one piece spacers.
Have a look at
www.empireracingcars.com to see what sort of cars he actually earns his living from.