There are several after market mounts available if you take the time to use your search engine. One thing about any of them though is that you NEED a cheek rest if you have a stock that doesn't include a riser.
The SKB mount is also very good and once tightened is very solid.
I have made lots of angle iron mounts for my own use and for others. They work very well. Weaver makes a flat Picatinny style mount to fit onto it cheaper than I can make one. There are other mounts out there to put onto the flat top as well. They all suffer from the same malady. Way to high for proper cheek weld. Mind you, some folks seem to like that.
The SKB mount is also very good and once tightened is very solid.
I have made lots of angle iron mounts for my own use and for others. They work very well. Weaver makes a flat Picatinny style mount to fit onto it cheaper than I can make one. There are other mounts out there to put onto the flat top as well. They all suffer from the same malady. Way to high for proper cheek weld. Mind you, some folks seem to like that.