My luck finally changed! I was thrilled to find decent model crows at Michael's. They are approximately life size, and there are two poses - one with wings folded, one with wings extended. I bought the latter and I think I'll go back for the other.
I don't see them on Michael's website, so they may be in-store only. The cost was $14, I think; I paid half thanks to a 50% off coupon.
Also... I've had several people ask me where I got my spooky tree with purple LEDs.
Michael's currently has a nearly identical tree in store now. It's actually even better because it has bats! :D It's $90, but you can get a 50% off coupon from Michael's website.