I made this knife sharpener to get a steady angle while using my wethstone. This Sharpener is compatible with stonen with a width of 61mm. The height of my wethstone ist ~29mm but depending on the length of the screws you can fit in most thicknesses (over time the wethstone will get thinner eventually).
It is a bit wobbly  given the fact that this thing is made out of plastic, but it is working great now for several uses.

YOU WILL NEED THESE FURTHER ITEMS:

4x M4x8 screws

4x M4x16 screws

8x M4 Threaded inserts