Have you checked where you bought the replacement crt from? Do they have it?
Yes, they tell me this strip doesn't come with the unit. I tend to agree as this is a special application where the gap the crt fits into isn't real snug and has gaps that let the fluro lighting filter through. I can possibly take the rubber off the old but would prefer to get new. They refered as weather stripping.
Might be worth taking the rubber off the old screen for the time being, but as Tony said, you should be able to get weather stripping from Hardware stores.
