Is that really necessary because i really think i will use one of them as a guide scope not both once i buy another scope or using Canon lens, the mounting rings are the same as they came with, stock one, you can see those from those pics exactly
https://astronomy-imaging-camera.com...m1-460x460.jpg
https://www.firstlightoptics.com/use...rtravel_80.jpg
For that ST80 i bought FLO dovetail so i can put it on mount, but i replaced the stock focuser to 2" CrayFord and that one doesn't have a place for inserting a finder, but why you asking to see those mounting rings or dovetails anyway?
Here are the focuser and dovetails i am using with my ST80, if you want i can take an image of whole setup for you, but it isn't the problem, i just need to add a new scope for imaging or using my current lenses.
https://optcorp.com/products/tpo-2-c...escopes-cf-crf
https://www.firstlightoptics.com/dov...-dovetail.html