I have a Metabones Speedbooster S EF to MFT adapter for sale. I have it listed on eBay currently but if the listing expires you can contact me directly. I used it pretty extensively with my G7 over the past 6 months for interviews and weddings. It's in excellent condition; like new.
Here's the listing link
Look at this on eBay http://www.ebay.com/itm/232212442385