I have a new unused Swarovski Digital Camera Base with balance rail that I got when I bought my Swaro STM 65 HD Spotting scope. This will fit either the 65mm or 80mm scope. It is for mounting a digital camera to take pictures thru your spotter. It is a great design as it will flip up for viewing and then allow you to just flip it down and take a picture. Here is a link as to camera land with a full description and shows new pricing.
I will take $350 shipped to your door. Thanks for looking!
Swarovski - Camera Land NY