Rings, curved base. Newbie observation.

I noticed today that the dovetail rings I have been buying for my 22lr rifles have flat bases which give full contact on their rails. However they only offer 3 points of contact on my new Hatsan rifle which is curved and looks like all the other rails I see on close ups of other air rifles. The rings on the scope from Hatsan are curved on the bottom offering full contact. Does anyone know where to get rings that have the curve in them? Or is this a job for Mr. Dremel? On the rings not the rifle.
 
What you could do is “bed” the rings to their mount. Gunsmiths “glass bed “ rifle actions to their stocks. You can do the same with your rings. Mount your rings and scope. Get the rings located exactly where you want them. Zero your gun. Then remove the rings from the mount / action. Then liberally apply a past wax. (Like Johnson’s past wax.) To your mount / action. Basically anywhere you would not want epoxy to stick. The past wax is acting as a mold release agent. Then get some JB weld and apply that to the bottom of your rings. But you want it to stick there. So no wax on them. Then re attach the rings to the mount. The epoxy will flow and make a perfect profile to the mount. Wipe off excess epoxy with q-tips. And let dry. 
That’s the basic idea. Do some research on glass bedding rifle actions. And they will go into better details.
 
I found one on Amazon blind luck. This is for my new Hatsan Vortex QE. It killed a BSA Outlook scope which the manufacturer claimed was springer rated the rings that came with it were also inadequate. So I found a one piece mount to start and will put the scope that came from Hatsan on I have adjusted the front lens to focus at 25 yards. I will try a Leapers UTG next as the budget allows. I appreciate your replies.