Just when you think you've got it all covered you find yet another job. The two middle windows on my bus are the sliding type with two panes of glass in each and one of them in each that slides horizontally. I believe they are original fitment. Although they've been refitted with new rubber seals to the body, I've noticed the seals in the metal window frames are disintegrating. Has anyone refurbished these and can you even buy the seals anymore?