Found a content provider (Andekan) that has a library of plumbing piping fittings - these are NOT free, but are available for purchase. I haven't downloaded any of this to test for accuracy, but if you're looking for this content and are willing to pay for it, here's the link:
These guys were formerly with Broutek, and founded this company a couple of years ago. They have content for Charlotte Pipe cast iron and plastic, Nibco, American Standard and more.
If you purchase any of this, please let us know what you think -
thanks - David B.