I bought one of the adapters on eBay. It was really inexpensive and uses pretty standard 6v batteries, the same ones that I get for my Mamiya 645, so it is really cheap. Here is a link to the auction for the adapter that I bought. http://cgi.ebay.com/ws/eBayISAPI.dll...sPageName=WDVW
His ad is goofy, but the adapter is inexpensive and works great for me.