-- Last Updated: Apr-24-13 3:26 PM EST --
Google 'skeg cable tube' and you'll get anumber of helpful leads to follow.. including some sources for the tube. There were a series of sites for DIY fixes, instructional ones, as well as parts .sources.
I don't know your area, but I've got to believe there'd be at least one shop that could at least direct you to a place to get it repaired if you're reasonably close to a city the size of Richmond.. And the previous responder noted a good hardware, and certainly a. decent marine store, should have brass and/or stainless fittings.
Here's hoping you find what you need and can get back on the water soon, and without leaking, and with a skeg. deploying, happiy
-Frank n Miami