I know, thats what I meant by a DIY compressor. I used one before, but it sucked. If it comes down to it, getting them professionally assembled is easier then using one of those...
You should check out SoCal Suspension garage and ask for Eric.
Mention T4R forums and he'll hook you up.
I got my front suspension (Bilstein 5100's) installed with Alignment for like $135 plus tax ($150 out the door). Figuring an alignment is usally $50-$100 alone that was a great deal and piece of mind for not messing with a compressor yourself.