Custom Spline that is Emitting

Hello,
Im trying to make this effect that is done in illustrator but I want it to emit. I have a file set up with an emitter which is good but what if I have a shape like the image provide?
Wondering if there is a modular way to replace the spline shapes too. https://www.dropbox.com/sh/jjmmpzmk6kjccfi/AAD1Vac-LiLPFKXzPvXJN2fHa?dl=0

Thanks in Advance
Marco