It might cost, but you can try using some of the flexable conduit.

You would have to put at least one end on the conduit as it is only about

1/2 to 3/4 of an inch inside diameter.

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Doh! Found this ... $34 It might work... but I wonder if aluminum is a match for my squirrels. It looks like I'd have to knife one end of the cord to fish it thru.


http://www.homedepot.com/p/Southwire...2103/202316476