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Just got some of these 'cold shoes' from Wide Open Camera so I can mount stuff like the Zacuto EVF onto the hot shoe like on other cameras and have a really small B-camera to my FS100. Also useful for my Rode video mic!
Feel that the quality is good - it is not plastic but anodised aluminium and feels very solid.
http://wideopencamera.com/products/
Check out the lens gears and vari-NDs too. I have the Lighcraft workshop vari-ND from WOC as well and it is a big step up from the cheap eBay ones for not actually much more dosh!
[img]http://www.eoshd.com/comments/uploads/inline/1/5048acdccc757_nex5ncoldshoe2.jpg[/img]