does anyone know where I can get an ESD symbol (Triangle with struck trough hand) from.
Or do I have to create it myself.
Here's a picture of it
Sorry, but yes, these have to be created unless you are lucky enough to find a vector file that can be imported.
The idea that you can underlay an image is helpful. And you can also consider using the image as a texture (Decal).
The only tip I can give you in creating symbols is to avoid filled polygons (solid hatch). I have had a lot of trouble with graphic errors. Trimmed offset lines representing close hatching is the best way to create a solid field. Have a close look at some of the supplied symbols and you will see this.