Yamaha and Suzuki use a type like that with spring however they dont mount with 2 screws. They are threaded and go through loop/hole in frame tag. Just look at what any late 70's early 80's PE or TS185/250 has.
MCS has a few similar universal types that mount with a bracket or you can remove the bracket and mount with a screw similar to your photo.
Just look at the MSC catalogue then ask a good local bike shop and they will help you.
