That's a great host, and you will like the build, but the most that I would do, is install the driver with the current pre-set for your diode, and have lead wires soldered on and ready for you. ('Hot' option)
But you would still have to buy your own diode and install it, to turn my kit into a laser.
The best places to get diodes, are modwerx.com, hightechdealz.com, or stonetek.org
Some offer to per-mount the diodes into an AixiZ module. For sleds, you can also check with scopeguy20...