This is a PCB that will accept superflux, PLCC-2 or standard LEDs. Even 10mm ones if you adjust them a little with side cutters... It's a work in progress, ignore the v1.0 on the board, the pads are too small and the silk screen needs a bit of an adjustment. Check out the files (KiCad) via github below and let me know what you think.
Can't speak to the quality of these particular ones, but I have bought LEDs (discrete, single color ones) in the past for a fraction of what I would have paid at Digikey.