[n86121]

The pilot side panel is just held in place by some rubber bushings, easy to remove intact.

I also saw one for sale on Ebay that could offer a template.

Lastly, these days, a decent hi-rez photo with rulers in both directions can be scaled pretty darn precisely. That is how Pfluger made the lighted custom overlay for my panel years ago.

The shop took a photo, sent it to Pfluger, who made a quick test piece, and then voila!

Pull any cosmetic fascia off and the outline should be visible for a photo