One of troubles with printable perf gauges is that users can often change the 'zoom' in the printing process and this can make them inaccurate.
I developed the free PDF perf gauge below with the printing features 'locked' so that this can never happen. While it is accurate it is certainly meant only for a quick measurement when a standardize gauge is not available.
http://DD-DESIGNS.CO/dnloads/perfgauge.pdfdon