I do recall it had Columbus decals & the frame was mainly purple, but can't remember the model or the specific Columbus tubing. What may help to date the bike, was the 8 speed 105 groupset (which I continually couldn't get used to - too many years of Campagnolo).
The catalogues will be interesting.
The company rightly get a lot of appreciation for their pioneering pedals & fine carbon frames - their steel frames are well worthy of respect too. There an absolutely beautiful Columbus framed Look KG 243 here:
http://www.retrobike.co.uk/forum/viewtopic.php?t=191523
An associated RB thread states a KG243 was built in Neuron OS by Billato in Italy.