customizing rear defroster

I want to know is there an aftermarket defroster like a rear one that you can put on the front window.(I know I can't put it on the whole front window) I want to install one low like on a forester for the wipers.
if not can I buy a rear kit and just cut it down to fit only like 3 inches up on the windshield? Its rough when your plowing and you have to keep getting out to clean the cowl and wipers.

If you can find a kit of some type (never seen one) I dont see why you couldnt do it.

Technically it would be illegal if its visible from inside. I'm not sure how Subaru gets away with it. Big check to the USDOT I guess.

I know you can buy aftermarket ones, it used to be a common trick in race cars to install them in the front window, especialy on common on rally cars.
Some have very thin wires, spread over a wide area and will have virtualy no effect on vision out the front window, if installed properly.