90 degree Viewer, too big

[RooDog]

I have a 90 degree viewer that slides over the eye viewer, but it was for a film A2 Canon. The sliding clip is too big for my Canon 70D. It unscrews, so I'm hoping I can just replace the clip. Anyone know who might sell them, and what those clips are called? Looks just like the sliding clip the flash slides on. You slide the rubber eye piece off to get to it. What size do I need for the 70D?

 Thanks Much, Greg

[Waddizzle]

Not sure what you have without a part number for the viewfinder. 

The one that should fit your 70D is the Angle Finder C.  It comes with Finder Adapters Ec-C, Ed-C to fit any EOS camera.