Here's a helper function I made to create each shader plugin with just a simple function call like this:
createShaderPlugin(name, vertShader, fragShader, uniformDefaults);
Then you can create each sprite that you want to be drawn with your custom shader like this:
var sprite = createShaderPluginSprite(name, size, uniforms);
Update: I started a GitHub repo for it here if you want to check it out.
I also made this little CodePen to demonstrate the usage with some comments.