Be cautious though, not all straps sold with 43/45 mm Heuer 01's fit all Heuer 01's witht the same diameter so ask an AD to confirm if it fits properly or not! Read more on that here:
Also, note that an AD may not sell you a strap from a limited edition watch unless you have that watch. This rule certainly applies in the TAG Heuer boutiques, although luckily, I knew a man at my local boutique when I wanted the Carrera McLaren MP4-12C strap for a different watch.