[Bhavesh]

Where can I get one and how could I mount it?

When I got the bike, everything was stock except for the flush mount front turn signals and fender eliminator (sawed off). However, since there wasn't a rear fender, there was no place to mount the plate nor was there a light for it. I passed the inspection but the dealership told me to get a light on there. Can I just use one of those LED windshield washer nozzles, in hiperwhite, facing the license plate? How does the factory light work?

 

[GreenEnvy]

That windshield washer nozzle thing should work fine, just make sure it's 12V, then find a 12V signal to run it off of, one thats always on when the bikes on.
I dont know how the stock system was on an 89, but on the 98-02 models the taillights had a clear spot onthe bottom, so the rear taillights acted as the license plate light too.

You may want to consider not putting a light on at all Unless the cops a dick I dont think you'll get a ticket for it, as long as the plate is mounted in a clear area.