Help finding a small part to cover rub rail and transom?

[hargefish]

Here is a pic of what Im looking for this was attached to both sides of the transom but one is completely broken off. This is the good one and looking for the same thing to go on the other side, any idea what this is called or where to find it, thanks

Brandon

[drfish]

Try tacomarine.com and look for "end caps".