I'm currently doing some repairs on a Cub that needed a new instrument panel. The only one on hand was too large so it was placed in the flat bed scanner and the image sent to Microsoft Paint where it was resized using the stretch/skew pull down utility and then printed, covered with package cellophane tape and fitted to dash panel.

To size, measure the length of panel needed and divide by the length of the panel being copied and place that number in MS Paint/image/stretch-skew/ horizontal and vertical percent box.

There are many different ways to do instrument panels.

Check this out:
[link=http://www.rcuniverse.com/magazine/article_display.cfm?article_id=1218]instrument panel design and installation[/link]

Ditto the using Paint to resize an instrument panel. After finding the correct one.
Those silly Chinese think one fits all. Whether it's the right size or the right one for the plane.

I have a bud putting together both an A-26 and P-61, both twins.

Take a look at the included instrument panel decal that came with both. So what if it's too big for the dash, is for a single engine craft, and says Bellanca on it.