I have a nice set of 6.5" felt lined tube rings for sale. The measurement is from ring to ring not including felt lining (felt may need replacing). I bought these on Astromart to use on my Meade 127 5" reflector, then I bought a DS mount for the scope so these rings are up for grabs. They are 1 1/2" wide with a 2 1/4" flat area on top and bottom with mounting screw holes. I believe you can use the top holes to mount camera or dovetail bar. Rings have kurled nuts to hold them together. I will take $45 and shipping charges in CONUS. Email with any questions.
Thanks for looking.