That P/N has been superseded to
0431004-43 --
SKIN
In Stock -- $1,161.00

I honestly think your searching for a rudder skin is futile as it isn't something anyone would have just laying around as an extra part on a shelf or in a pile of hangar parts- these items if ordered are usually for a specific repair, and are not ordered in quantity.
Most folks needing to repair a damaged rudder usually just find a good replacement at a salvage provider, where you can get a complete assy for far less than just the trailing edge skin from Cessna, AND forgo the labor to install it.
I'm certain you can source a complete rudder for less that the $1161.00 skin only.