I am sure if you ask an AD they will point you in the right direction. If you are looking for used, and Chrono 24 doesn’t have any, try watchrecon.com. Not much that doesn’t pop up on there.
I tried on something similar in an Omega boutique in London (platinum). Cost was 38,500 GBP. Bear in mind this was just for fun and I was by no means going to buy it (the AD knew this, we were just talking watches).