Print the caddy. It is designed to mount to any of the four corners of the top deck using the two existing bolts there. Since the mounting ears are the same size as the existing washers, you can use the same bolts already there. Can also be printed without the mounting ears for gluing in place. Nozzles just drop into the hex-shaped wells. The well size can be made slightly smaller to make a snugger fit. It's designed for the Printrbot+ but may fit the LC and regular Printrbot too - I don't have one of those so I can't tell.
This is my first Thingiverse design.