So jab farmpilot Daysleaper & a lot of others are saying is you were sold a product that had\ has a design fault, there is a cure but the manufacturer ignores the problem, (how many times have I heard "You are the only person who has complained") and we the user\ buyer pays,
Rely telling remark JAFO good customer relations, the cure is supply the device so as not to self destruct, if only one cover made there need not be a price increase due to inventory and manufacturing savings.
These are not cheap items, If your visor is being damaged by poor design \ manufacture COMPLAIN, Ask for rigid cover and new visors At no cost including shipping! & keep asking.
There are customers looking for helmets who will look at other options, or not buy one.