d30 feature is part of the ever-updated-and-slowly-but-surely-going d30 Sandbox Companion. This chart is a major contributor to the "ever-updated-and-slowly-but-surely-going." I don't think it's quite there yet, but I think I'm close. It's been difficult finding a way to keep things to as few rolls as possible, while providing an amount of variety in results and avoiding to much repetition. Ultimately, I think the charts on the left hand page (showing which tables to use by class and level) will have to be "broken out" a bit more, and a couple of more magic item sub-tables added. But the general idea is working for me (just getting to this point was a bit of a battle), and just feel like its a matter of refinement at this point.
To download a free PDF of these d30 NPC Magic Item Determination charts from MediaFire, click here.