For those of you who don't see the need for two jacks on one guitar, we offer this single-jack jackplate for your Rickenbacker guitar or bass. It's the same size as the standard dual-jack plate (1.125" wide x 2.88" long, with screw holes on .850" x 2.5" centers), and yes, it's pre-curved to fit the body of your instrument.
 
And yes, we include the four mounting screws.