Havlins down in the US sells a sidemount for the old Mossbergs that is for 1 inch scopes. You can also adjust the scope back and forth on it. It works great on the Mossbergs. Now, I have put Weaver side mounts on old Mossbergs but it required drilling different holes in the mount which was no biggie. I'm thinking if the Weaver worked on the Mossberg, the Mossberg mount should work on the Cooey if you drill new holes in the mount. The mount from Havlins is $23.00. Brownells I think sells them as well but are a bit more. Of course there is mailing cost. I'm not sure if Havlins will sell to you though so you might have to get someone in the US to order it if you go that route.