Work at SourceForge, help us to make it a better place! We have an immediate need for a Support Technician in our San Francisco or Denver office.
Actually, I traced back who made the icon and asked him to provide the
source (SVG) files. They are attached to this bug report  now, and
await being added to PiTiVi.
Andreas shared with me his concern for making a high-resolution,
high-detail SVG version for a 256x256 canvas (like this: ), but still
hasn't gotten around to it for lack of time.