How about the SSR? I'm having a hard time finding that also!
Thanks!
SSRs are already in Fritzing. Search the parts window for 'relay' it's called 'relay-solidstate'
There's also a couple of handy libraries around :
https://www.sparkfun.com/static/fritzing/
https://learn.adafruit.com/using-the-adafruit-library-with-fritzing/import-the-library-into-fritzing