I need of a 7.5-8mm Round Cut Blue Sapphire ASAP

Hi! I Have a customer in need of a brilliant cut blue sapphire ( can be heated but must be natural) He’s replacing one that is 7.9mm round by 4.87mm Deep so something around that size and mid blue. This is needed ASAP. If nay one can help please email me : allwoodmike@comcast.net