Nick, be wary of the cheap Bino Mounts as they tend to come loose and can cause problems like stripping the thread in the Binoculars.
After a lot if investigation on various forums I purchased this mount for my Fujinon 10x70s which are probably a little larger than your Nikons.
http://www.farpointastro.com/products.php
I would think that the Nikons were not cheap and deserve a solid mounting.
You may find these threads interesting..
http://www.cloudynights.com/ubbthrea...v=#Post4788774
http://www.cloudynights.com/ubbthrea...v=#Post4905256
I don't have any interests in the company etc.
Michael.