Happy New Year Matt!
Welcome to the website also. Where are you from and what size boat is this going on? Just curious :-)
West Marine, Overtons, Defender, Bass Pro Shop and or any other marine supply store should be able to help you.
If you have a store in your neck of the woods, just take the bottom plate off and bring it in to match. If not these stores all have websites and just point and click!
Hope this helps and good luck!