Really nice bike, I thought it was going to be equiped with as many Syncros parts as available though! I've always had that idea in the back of my mind ...
I have that '97 catalogue too, it's really cool. Oh and an Obed frame (99) though it is currently stashed behind a sofa. I am a sucker for rainbow stripes too, nice idea there.
Today though I wrecked the thread of the upper clamp on an old Syncros post (same part as on the bottom left of your fourth pic, but older (flat) model on which the spacing between the two bolts was greater, so cannot use the same part as on your photo - I tried as I have a few Syncros posts). You don't happen to know where to find a spare do you?!
Otherwise I will try with a nut, as the bolt is long enough to poke outside of the clamp.