I bought and sold 2 Meade Flip-Mirror systems (one 1.25" and the other 2"). I included in those sales ALL of the parts that come with the Flip-Mirrors ... but somehow ended-up with some extra parts (perhaps included with other things I had bought). So here are three rings that I think were originally included with the Meade Flip-Mirrors. If you are in need of one or all of these parts, please contact me.
I don't know exact dimensions, but could measure them for you; most of these convert 2" (?) accessories to a T-thread (for connecting to astronomical cameras or to a T-ring for DSLRs)
Please note that the price includes all three adapters, and CONUS shipping. I do not charge extra for PayPal.
Sierra Skies Observatory