Looks like we might have a candidate from newegg...
Newegg.com - Microsoft 4CH-00012 Aluminium 5 Buttons 1 x Wheel USB Bluetooth Wireless Laser Mouse 8000 - Mouse
But peculiar mixed reviews. Some raving saing it's easy, some saying it's unmitigated rubbish. Very strange. Shilling?
EDIT: Hadn't found a sony one, but will continue hunting...
The main problem with all of these seems to be battery life. Some people quoting 2 weeks for a set of batteries. I get about a year at least from a set for my current mouse... VERY strange...
EDIT 2:
Amazon.com: Sony VGPBMS33/B Bluetooth® Laser Mouse: Electronics
This mouse?