I have used the ETX125 on my Evolution mount and takes it no problem. Alternatively you could use a Nexstar SE mount (have had one in the past).
Yoy can also look at the Skywatcher range of single fork arm mounts. One option is the AZ-GTI , that is sold with 127mm similar scope.
One note with most of these the scope will be rotated 90 degrees fro how its normally mounted. But not a big deal.
You will need to get a Vixen 7" universal dovetails to mount to the holes already in place at the bottom of the OTA.
https://www.bintel.com.au/product/lo...v=322b26af01d5
I have two one OTA on its own and one full ETX. Seriously need to downsize but optics on both are good and i cant decide.
I was going to convert the second OTA to a Wegat but have not got around to it.
see here
https://www.cloudynights.com/topic/7...n-rail-add-on/
http://wegatoptical.com/shop/
Photos attached.
Kind Regards