Hello, and welcome to the forum. I have an '07 189 Sport that had the same trolling motor and bracket. I'm pretty sure Nitro quit making them, but you can always check. I always try
http://nitroboatparts.com/ first. If they do not make the bracket any longer, you can always have one fabricated. I put a Motorguide Xi5 on mine, and Cabela's built a new mounting plate out of hull material, and then added the Motorguide quick release bracket (on and off in 10 seconds). My experience with the stock trolling motor was that is was underpowered, so the Xi5 has been wonderful, plus the GPS and spotlock are awesome.