Check this out: http://www.velovilles.com/fahrradteile/sattelstuetze/Super-Record-Colnago-26-8-mm.html
It's ridiculously overpriced but the interesting thing about it is that they milled it down from 27,2 to 26,8. So you could look for a really scratched cheap 27,2 seatpost and ask your local metal works guy if it is possible to mill it down to 27,0 or 26,8.
Check this out: http://www.velovilles.com/fahrradteile/sattelstuetze/Super-Record-Colnago-26-8-mm.html
It's ridiculously overpriced but the interesting thing about it is that they milled it down from 27,2 to 26,8. So you could look for a really scratched cheap 27,2 seatpost and ask your local metal works guy if it is possible to mill it down to 27,0 or 26,8.
A bit of an understatement, innit?