VarAC offers direct CAT command support for various RIGs. You can download the most updated CAT commands file here.
If you found a mistake in this file or want to contribute a set of CAT commands that is not listed here, please submit your request as a comment on this post.
Download link - Version 5.7:
After downloading, unzip the file and place it in your VarAC installation directory
Some folks have shared screenshots from their VarAC setting screen that so you see what worked for them: