You can make your own from any compressor too.
Output the vocal track to a bus.
Create a Send, routing the vocal track to an aux track.
Insert a Sonitus EQ on the aux track, set the first node to high pass at 1000. Copy this setting to all other nodes. Solo this track and turn up the output gain as necessary. You should be hearing only S-sounds really loud. Turn off solo.
Now add a compressor like ca2a to the vocal bus and send your aux track to the side chain input on the ca2a on the vocal bus.
You are now in total control. You are in control of what triggers the de-esser. You are in control of the compressor you use. You are in control of all the settings you apply. You have a gain reduction meter that shows when compression is applied.
This works because at the time of sibalance, there is no other sound you need to keep. Even with a good amount of bleed, as long a the vocal is significantly louder you can make it work. Lots of cymbals might mess it up though.
I have a two channel hardware compressor. Using this technique, I can De-ess a vocal for a live performance. The compressors in my UCX don't have sidechain capacity, so I use hardware to do it with zero latency. Doing this costs me two sends and an input on the interface.
The benefit of not doing it live in sonar is that I can push the buffer to max, making the recording very safe. Latency doesn't matter. Once latency matters, I can add a sonar de-esser without real fear of increasing latency much.