grabrails

Anyone recommend a source for replacement teak handrails on a '73 E27?

I decided to find the leak coming from the topside grabrails on my E25cb today. After I wrestled the postside grabrail off, I was dismayed at the amount of wet oatmeal I found (first picture). I dug around with a small allen key about as far as the marked dotted red circle shows (second...