I would like to locate one of the threaded mounting blocks that is used on several of Orion's short tube refractors that enable them to be used as spotting scopes on a camera tripod OR some rings with this type of block attached. The rings would be preferable. I am looking to attach one to the OTA of a Nexstar 80 so it can also be mounted on a camera tripod. If anyone happens to have one lying around and does not need it, let me know. Thanks.