The Front Panel Designer software is available free from Front Panel Express
(
http://www.frontpanelexpress.com). If you run Windows (or
a Windows VM under Mac OS like I do), you can
1. Download it from Front Panel Express,
2. Install it,
3. Run it and open the panel designs,
4. Print them.
I don't have Front Panel Designer running right now, but I recall there
being an option to print to scale (1:1) and with centers marked. So,
as long as your printer prints 1 inch approximately = 1 inch (1 cm ~= 1 cm),
then you're in business. It's how I ensure the accuracy of my panel
designs before paying $$ to have them manufactured.
Cheers,
Dan