Not sure where you got touse prices from but they seems to provide all you need to make one your self.
Schematic, BOM, Gerber files, programming instructions and software in a binary. So no open source but still...
It's a quite simpple design and I'm tempted to make my own PCB with levelshifters/isolators included so that you don't need another BOB to interface with the motor drivers.
Still need to pay for "Authorisation", no details on the cost of that (unless of course you contact them via mail).
