I started this project a couple of months ago and ended up doing a lot more work on it than I planned (namely in processing kick sample after kick sample after getting such good results from the synth).
https://www.snow-audio.com/z3ta-kicks/ There are 20 kicks and 10 presets available for free from the link at the bottom of the overview. Audio demo can be found under the audio tab, or directly
here.
Word of warning: these are not subtle kicks (for the most part). They take full advantage of Z3TA's distortion modes, analog settings, and wave-shaping capabilities. As you can see from the animated gif on the page above, the X-Y axis has been assigned to control the tone of the kick making these presets super flexible right out the box.
Enjoy!