Hmmmm... The paper was gone on my 62 GT lights when I got her but what about stopping by a light supplier like Living Lighting, or an electrical/plumbing specialty shop (not big box) and asking about lamp shade fabric possibilities. There has to be some kind of material that is rated to handle the heat. However that would not be an issue if you switched to LED light bulbs, they are much cooler, so you could use an easily available material.
TV: 2007 Jeep GC Laredo diesel
Toy: 1995 Jeep YJ
Experience is what you get from not having it when you needed it.