I picked up a bunch of parts from ebay on my recent trip to the US.
A friend gave me a set of purple Aeroheads (I wonder why?) I laced the front up to an old Record hub, and the rear to a fixed/fixed Formula. It was brilliant to true them through the fork, as looking through the steer tube made it extremely easy to dial them in perfectly.
Setting it up to measure the fork (and with the tubulars I will sometimes use).
Finally finished. I ended up cutting the fork a bit longer than I had expected, but better too long than too short.
I found an S6 headset cheaper than I could find an S2--- unfortunately it was brown, rather than the advertised black (on ebay). For what I paid, I cannot complain.
I chose a road setup to stay compatible with all the chain rings (on my other two fixed bikes).
With a steel fork, pedals, and everything, it weighs in at 8 KG.