Cutting wood to match the profile of a dado rail

In my long-lost youth, I recall seeing a tool that traced the outline of an irregular edge (for example a dado rail). The tool was basically a piece of plastic that had a number of rods that were mounted in it, and pressing these against a dado rail would replicate the profile of it. This could then be used as a template for drawing, etc. Does anyone know if this tool still exists, and if so, what it is called or where it is available?

Alternatively, can anyone recommend a good way to cut a piece of wood to match the profile of a dado rail.

Profile gauge

eg:

http://www.google.co.uk/search?q=Pr...gc.r_pw.&fp=eb1510c83955ff16&biw=1280&bih=885

Easy way to cut a profile for jointing (if that is your intent) is to cut a piece of the dado at 45* and then carefully cut along the edge where the face joins the mitre if that makes sense. Alternatively with a square cut stand it on a piece of card and simply draw around it.

I have had a profile gauge in my toolbox for years... not been used in many of them tho! They are useful-ish but I now find it quicker to judge by eye or using a bit of cardboard. I find the gauges can be misleading sometimes, so am wary of having too much confidence in them.

With cardboard you can trim away and assess/mark any cuts/gaps better and act accordingly I think.

i cannot remember the last time i used my gauge,think its buried in the garage somewhere.

i do the same as ladylola.