Looking for an 90 deg tube for holding tank

[dougmitchell]

I have a bung instead of the tube that brings stuff into my holding tank (and also pumps stuff out). Anyone have an idea where I might come across the correct tube? Or even if it's possible to fiberglass a replacement tube onto the tank? It seems like all fiberglass around the bung, so I assume I would be fine fiberglassing the new tube onto the tank, but maybe I'm wrong.

Ideas?