I don't know what Warmoth based their Dinky P and Js on, but Fender's Deluxe models with 22 frets (the ones Warmoth has disclaimers that their necks won't retrofit) have Dinky bodies with pickguards. But again, no guarantee anything will fit or line up. There are plenty of custom pickguard makers online that will make you anything provided you can make and send them a tracing.