This probably has more to due with getting a good process for making spares. The production process is different for hoods that go on cars compared to those that are made for spare parts. Think - metal, stamping, assembly (putting mounting hardware on hood), installing on car, paint. So when creating a spare they have to get primed --- but not on a car. When I worked for another manufacturer they had problems getting the primer to work correctly, especially when switching metal (actually the coating on the metal). It would not surprise me that a process change (probably in paint) is holding up spares from getting here.