I know someone out there makes polished metal protection rings. Be careful though, the lineman may think its ok to tow from the reinforcement ring instead of the bolts. I extended my tow Pins/bolts to protrude beyond the wheel pant by just a slight amount just to make it clear that the pins are used for towing. I know of someone who had the wheel pant ripped off by a line guy pulling the plane with the "hole" and not the pin!