I've got the same keyboard, and the short answer to your question is; there aren't any.
Okay, that's too harsh. There aren't very
many other keysets I've found that work with back-lit keyboards. I've seen pictures (Look at the Ducky page on Facebook, for example) showing white/translucent keycaps on backlighted boards, but for relatively opaque keycaps with clear legends you'll have to scrounge other brands (again, Ducky...) for non-stock replacement sets.
There are a few OEM keycaps that had transparent windows for NumLock and CapsLock, as well as sets for video editing keyboards or airline ticket agents that had a lot of windowed keys, but there you'll run into issue with LED placement. CM puts the LED at the top of the switch, while most OEM Cherry boards with backlit keys have the LED at the bottom.