Are Plug & Play Trailer wiring harnesses still available?

Hi.
Just bought a 2009 RS roadster and a Blackhawk pull behind trailer (brand new barn find). I need a harness for the bike.
It has a 4-pin round connector.
Does anyone know if there are any still available?
If not, I can make one, but I would like a Plug and Play.
Thanks.

You can get the wiring harness for the RS from Lamonster. https://www.lamonstergarage.com/5-to...ire-converter/

You can pick up a flat 4 to round 4 adapter at Wally World, Tractor Supply, Auto Zone, etc.

Nice find.