cab curtain recommendation

[NW Modeling List]

While checking out the HO MTH J, I noticed the model has cab curtains,
something I've never seen on a model J before. Thus, can anyone recommend
parts, or even materials to add cab-curtains to a J? I notice Rio Grande
Models and Athabasca Scale Shops make them. Of those two are either, both or
even neither close enough to model cab curtains with?
Maybe MTH will sell the curtains from their J model?

Alvie
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