Thirteen years was a good run considering the salty marine environment they lived in most of the time. Though when I went to replace them I decided to try a little beefier pair. Namely a pair of Seasense Clamp On Heavy Duty Oar Locks:
Definitely a little heftier than the originals. My only concern was whether the pins would fit the Porta Boat's oar lock sockets. I kind of bought them on a whim. Happily, they fit perfectly into the sockets. They are a little loose around the oars but, will not slip out beyond the Oars handles.
Another nice thing it looks like some parts that might wear like the bolts on the swivel can be replaced quite easily. Though I doubt I'll have to do that for a real long time.