Scarce as chickens' lips this one. It took me years to find mine. I have two, but I have two bodies. I put up a search on eBay with notification, that's how I eventually found mine. I also found another one on Adorama by a lucky random search. For your reference, the Adorama one cost me $70 (£120 with shipping to Switzerland). I found one on eBay which cost me $150.