I've got a BNIB tripod collar ring mount A-II (W). It's the one sold by Meritline and is considered the most genuine and best performing of the non-OEM units. It has the new style "bend" that the OEM unit has, and it performs similarly. I use this one on my own 70-200 F4 L IS USM. It is designed to work on a variety of lenses including the 70-200 f4, 70-200 f4 IS, 400 f5.6, among others.
See the item here http://www.meritline.com …t-ring-a-2---p-39230.aspx
Normally you'd have to wait 2-3 weeks to get it, but I have one available that's completely unused, brand new in box that will get to your con-USA door in 1-3 days. It will ship from so-Cal.
$20 PP gift and shipped to con-USA. Please use PM, thanks.
