Those are really long gages for that test. We always run either the EA-06-062TH-350 or SK-06-062TV-350 patterns depending on whether its at room temp or cryogenic temps. The biggest key with these little guys is to get them lined up just so before bonding them down.
Mark the specimens carefully after prepping, I use a 6" X 0.5" scale and always mark to the same side of the mark, then stick the gage to the tape, line up the gage with the marks and stick the tape at one end. Now you can peel back the tape and gage, apply the adhesive, clamp and cure.
Remember that a 1° delta in alignment can result in around 5% error in results.
HTH

Mark Haynes
Senior Engineer
Composite Technology Development

You could try Micro-Flexitronics (http://www.mflstraingauges.com/). They offer a large variety of strain gauges and also will make them to your requirements if needs be. They're cheaper than VPG and delivery is usually less than two weeks.
You'll still need to get your adhesives from VPG though.

M