$1699 for 12" brakes, $1799 for 13" brakes.
You are forgetting the 100's of hours labor putting the DSE kit in. You'll have a tenth of that with our systems. Even if you are doing it yourself your time is worth something.
We make complete packaged solutions, not sure where you are seeing the piecemeal options. All day long I sit on the phone talking with customers and helping them plan their build. We have all the core components you are going to need from small fittings and gaskets to the big stuff.
Give me a call if you like, I'll be happy to help you put a compatible plan together. 8-)