I was unable to find a "surfboard" for the 6-pin RGB leds but I did find a solution that allows the pins to be wired without bending them. The following link is for a small through-hole protoboard (Catalog #: 276-148) with pads on every hole. The pin spacing is the compatible with the RGB LEDS. The board can be sectioned into small 1"x1" squares with a hacksaw or table scroll-The led can be inserted into the PCB and the connection wires and be soldered to the extruding pins on the back-side and then trimmed short after soldering. This would allow the RGB leds to mounted securely without any bending of pins. The board cost $3.
I would recommend 24 guage stranded wire for this connection with 1" pieces of 22 guage solid copper wire soldered to the ends of the cable to plug into the breadboard.