Peter,

in that site you just can find replica parts for who wants to build up a fake Daytona.
Also the watch in the picture you published has never seen the Rolex factory.
it would have been destroyed if been there.

The 6263 little hands fit all the valjoux 72, so they can work also on 2446.
But the genuine handset is a bit fatter than the Heuer handset, and with pointed tips, so it's not a nice marrige in my opinion.
I would go on finding the genuine one!