I just discoverd "Chunks Bournville" by Cadbury. They are dark chocolate chunks, about the size of a chocolate chip, and I swear they taste just like a Nestle Semi Sweet chip. I got them at Sainsbury's in Kingston. They come in a red pouch and are 180g. I don't remember how much they were, but I don't think they were much more than a £1. I used the toll house recipe and they were great.