I had what was purported to be one of the first few sample bikes that Chris built after leaving Witcomb - in other words, pre-Fat. Beautiful, lugged construction with star cut outs. It was a 60x58 (I'm pretty sure, but it may have been just slightly shorter in the top tube, it was built in the late 70's). The bike had been sent back to Fat Chance for repainting and emerged with Slim decals. Otherwise it was mostly original with Nuovo Record. There are pictures of it on the site.
I sold it to a coffee shop owner in Toronto, Canada. I'm not sure he would part with it, but you might get in touch and make him an offer. Tough to find these bigger bikes!