daniel nikon make a bracket similar to eric's picture - google nikon binocular accessory & you should find it - the DIY version is a piece of pipe the bino barrels wll fit in -cut it in half, attach a bolt for tripod thread & some sort of strap to do up & hold them..
oops i just found the link
http://www.opticsplanet.net/nikon-u-mount-820.html