Picked up a second bike at the same time. Also a Centurion Lemans 12, but in the up-scale RS version which I believe has a slightly different headset and fork. Got them both for the combined sum of $250. Will tear them both apart - slowly - and rebuild them one at a time. It'll be an enjoyable winter. Here are the CL links, but I suppose the seller will pull them soon. First, the Lemans 12:
centurion lemans 12
and the Lemans 12 RS:
centurion lemans RS frame