The Badger 1.5" one piece should do it fine. It's a SOLID mount. It's what I use for a 30mm tube, 44mm obj. on an SR25 and the eyepiece, which is huge, clears the KAC flip ups just fine. I get a good cheek weld and image too, it's not just "what works" it's actually what I wanted. I have an ER25 with rings the same height on a .50 and it has a (58mm?) obj. and is fine. They have a few different ones at different heights, lengths and cants (mine will accommodate a USO erector, you know how hard it is to find a good mount for those?) if you don't need the 1.5 just call 'em and see, they know what their shit fits thankfully. The SN'd USMC rings are a work of utilitarian art. Any of their caps will work with their rings as long as they fit; doesn't matter if they are aluminum or not. The aluminum caps are also indicated for use on the USMC rings when rails or special caps are needed; I talked to Badger and they told me the aluminum caps do nothing to the performance of the mount, nor do they take anything away.
Any 1.5" one piece mount should work so it doesn't have to be Badger. They make some heavy shit but it's good shit. Their rings and mounts don't require any work prior to use.
1.5" will also generally work with clip on NV and thermal too FWIW. Badger quickly became on of my go-to's. They have good shit and they usually have exactly what I need.