Perhaps I've been having trouble finding a sweater pattern for the little lady because I've been searching on the wrong terms. Today I tried "wrap sweater pattern" and found this, which could certainly be adapted to the yarn I've just swatched (yummy!). I wonder if I could even just do a top-down raglan cardigan and figure out the overlap(s) - extra increases on the edge, I'm guessing.
This looks promising, at least structure-wise, though it wouldn't be on US3s. Looks like I should just draw and measure and make it up as I go along. Whoa! Adventures in knitting for sure.