I'm not sure I'd be too worried about the lack of Z logo on the forks - Lemond's actual '91 tour bike didn't have that logo in the Bicycling article I've scanned for you, and I've seen another '91 replica built up that lacks that logo. It could be the fork isn't original but if it's a Kestrel EMS and the paint matches then I'd be happy.
However, the forks do look a bit scratched up from the one photo provided. I'd definitely want to see a whole lot of detailed photos before putting up the cash.
Tim - if you don't get a chance to see the frame in London let me know where it is and I'll take a look next week (I'm based in London). Shame the auction ends on Sunday - perhaps he'll put it up again?
All the photos I've found of the 1991 bikes (which are basically those with Mr Lemond on board) show the Z logo to the fork
Although you're right that it isn't necessarily a cause for concern if they're matched. More of concern is the pics seem to show they're scratched up and possibly not a good match.
Hopefully speak to Tim at some point today to dicuss this.
Have asked seller for more pics. Nothing. Am keen on this but not taking a 'punt' nor willing to get bent over.