A complete conversion/restoration kit for a 336/12 or 366/12.  You get the upper and lower guards, the comb mounting plate, the comb guide, converter comb, and the arm retaining screw for one low price.  How can you lose?
 
And now -- we're happy to offer a kit to convert your 24-fret 330 or 360 to a 336 or 366.
 
Even betterer: you can also have the guards in either black or white acrylic.  Your choice.