Here is a good basic video on SCAL and using the software to draw objects and trace. This is a great overview if you have not watched it already. It doesn't tell you how to create that specific shape, but if you understand what the tools do, you can create it.
https://www.youtube.com/watch?v=OQPhkeRVF4AThere is a set of paid quatrefoil files here:
http://www.thelatestfind.com/p/quatrefo ... ables.htmlHere is a freebie:
http://freesvgs.blogspot.com/2015/05/qu ... e-svg.htmlI cant vouch for the quality of any of these files, but you can google just about anything and find what you want...
And there are literally tons of images on Pinterest that you can grab and trace. Some are in pdf format so the software will do the tracing for you. But regardless of what you do, that video is a great place to start to understand how to make files on your own or to alter them.
Good luck!