Hi Roger,
.
Do you mean Cinelli Professional or Centurion Professional,
Centurion's Cinelli-look-alike model of the mid- to late
'70s?
.
Over the last five years I've been looking, I've not seen
one Centurion Professional come up on eBay. I've seen a
few very similar Centurion Semi-Professional models, which
were one step down from the Professional. So my guess is
that you will have a hard time finding one, especially
in your 60cm size. I ride 62cm c-c and bikes 60cm c-c and
larger are much harder to find, especially among the higher-
end models.
.
Are you a Kiwi? If so, do you know the name Bill Sutch, NZ's
Industries & Commerce Secretary in the '50s? My mother knew
him at Columbia U. in New York when they were graduate
students together in the 1930s. :-)
.
More on Centurion bikes at:
www.sheldonbrown.com/centurion
.