bloodworm is a term that is a little miss-leading. They are actually a midge larva. The best place to find them would be certain pet stores. A lot of people use them to feed aquarium fish. They sometime have them refrigerated, not live. If you ask them though, they may be able to order you some. I've been all around the midwest, and I have never seen them in a bait store. I'm sure some bait stores have them, I've just never seen them.