I was going to suggest this one, but it looks like it is out of stock. Not cheap but works very well.
https://www.acratech.net/quick-release-clamps/locking-lever-clamp
I am a photographer by trade and have used Arca Swiss clamps for years. I believe the one I linked is better than the RRS model because it is adjustable for
your individual rail. You can adjust it so that it is very tight on your particular rail. The RRS clamp is made to fit RRS rails and is not adjustable for other rails. As stated earlier there are variations between different manufacturers. If you have more than one rail you may have to adjust for each one.
If you don't want to wait or spend that much you could probably find a different model of lever clamp that has some adjustment. In my experience you can get a much better fit with a lever lock compared to a screw lock clamp. If you set it and it slips then you can just tighten it up a bit more. It will be more difficult to open and close but you can set it so that it will not slip.