Yikes! In your original post, you mentioned that they no longer make the
same style of paneling. But, I think it would have helped to mention that
the paneling is already painted.
Given that the paneling is painted, creating an almost matching repair
should be easy by doing what you wrote below.
For matching the paint, I would take a large enough chip or piece of the
original paneling (a 1-inch square piece will do) to Home Depot and ask them
to make a color match sample jar of the paint (costs about $3.50 for the
color-matched sample jar). It helps to know if the original paint is flat,
satin, semi-gloss, etc. That saves having to buy a whole quart, gallon,
etc. for such a small repair paint job.
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