Well the seat arrived on Friday, and I was pleasantly surprised! Now I know that the K0 experts here will be able to spot it as a repro from at least 50 feet, but it fits well, looks good, and, most importantly, is comfy too.
I took the bike for a ride today and stopped at a gas station to re-fuel, and the first thing a guy filling his car next to me said, was "nice bike mate, I like that seat!" The rubbers underneath are different, but everything fits nicely, so I'm happy! Cheers, Terry.