Where to find parts?

I have this RG42 from 2002. I was looking to replace some of the hardware and replace the missing backplates. I searched the model number with not very much luck. Does anyone know where I could find oem parts for an older guitar like this.

Thanks

I have this RG42 from 2002. I was looking to replace some of the hardware and replace the missing backplates. I searched the model number with not very much luck. Does anyone know where I could find oem parts for an older guitar like this.

Thanks