Wolf Tucker is supposed to be very good, Natural Instinct and Honey's real dog food also do complete pre-made raw.
If you just want bone-in mince there are lots of suppliers, but most people who feed this way have a large freezer and order in bulk to keep the costs down. It is quite tricky if you just have one small dog, that is why I prefer to shop at the supermarket/butchers, I just don't have the storage space.
Prize Choice is available in large pet shops like [email protected]
, all the varieties that include chicken have bone in. You can just buy a block at a time if you don't have the freezer space.
Are you on FB? There is a very friendly raw feeding group called Raw Feeding, lots of uk members feed minces, so a great place to ask about suppliers.
Here's a link to their suppliers/distributors file
Have you asked your butcher if they do a pet mince? Lots do, and should have bone, meat and offal included. They do tend to be a bit vague about ingredients and proportions though.