Review on Cullaby Contour Gauge: 10 & 5 Inch Duplications For Perfect Templates Of Curved And Odd Shapes, Plus Bonus Angle Ruler & Carpenter Pen! by Marcus Hussain
Looks like it will do the job
I have not used it on a project but did test its ability to move to a shape. It stays put until you make it straight again, but it also has a lock that slides to keep it from getting out of shape accidentally.
Pros
- ok
Cons
- May not replicate the exact curvature of the original shape
