One of my friends trained as an architect. He doesn't do that work now, but he held onto his stencils - and passed them on to me when I whined about needing some here on this blog.
So he dug up his stencils and passed them along:
He also gave me some paper, too, which I'm not quite if I'll use or not - I do have a lot of graph paper and I don't have an easel/desk that'll fit them. But the stencils, yeah. My round rooms and looping passages will now actually be round, and loop, without me dragging out coins and such. And I've got a set of straightedges more superior to my existing cruddy rulers.
So, thanks man, I will use them well!