Yes I created the part using Inkscape and other tools I have written over the years. You need a svg editor. I use Inkscape, but there are others (Illustrator and others but Inkscape has more control than most of the others.) There are tools available (if not all that easy to use) available but making parts is no where near easy. The following two tutorials apply to current Fritzing versions (many of the others are for older Fritzing versions.):
I lately learned there aren’t links to the videos in Old_Grey’s tutorial so you need to do a google search for the title and then they come up on YouTube.