Here ya go. All parts sourced from J&P Cycles.
Chrome Laydown License Plate Mount #3400050 $26.99
License Plate Marker Light Mount #382-472 $39.99 (not available when I did mine so I made my own)
or
Light Mounting Bar #381-518 $9.99 (this is what I ordered and cut in two to fit)
LED Mini Cateye Custom Marker Light #3300006 $29.99 ea x 2
Load Equalizers for Custom Applications #ZZ38202 $17.99 (to control the flash rate)
LED License Plate Illuminators #ZZ34360 $34.99 (required to pass inspection)
There are other options to make it your own.