Maybe all stores don't carry it in stock.
On the West Marine website,
search for 'cable cover'.
I used the split cover made by
Davis. They range from 3/32" ID.,
to 3/16" ID. I used the 1/8".
It may be called, 'snap on cable cover'.
The OD is nearly flush with the rudder cable end
where it catches.
I only covered the cable from the front fitting to
the plastic grommet plus about three more inches
when the rudder pedal is fully forward.
This was for two reasons:
although split, the cover is hard to get over the cable
and I like to be able to inspect the cables.
It came in a 6' piece, so I should have the remainder
around somewhere. If you can't find it, let me know and
I'll look for it. It would cost you an airplane ride, though. {
Tom