Thanks @MerakiDave for the detailed reply. Much of what you describe are the workarounds that I have been using while patiently / hopefully awaiting a new updated official stencil set.
I have not thought to use the images from the sizing tool for this purpose, that's creative.
I personally have just been grabbing images off the web, cropping them out in GIMP, and then exporting them from there and importing to Visio and creating new master shapes from these freshly cropped images. This is all fine and dandy and I will likely continue to do this, but just was maybe hoping there was a *cough* roadmap *cough* for a new stencil set.