Where to buy a field headspace gauge?

[WHG]

I'm looking for a field headspace gauge that is .074. I ordered a Forster Field gauge, but it is .070 and I want one that is military spec .074.

[M1Garandy]

Forster will make you an .074 gauge if you ask them. Or, look here: http://www.arrowmark.com.au/gauges.aspx

[Parashooter]

Cut a 1/2" circle from an aluminum beer can. Measure its thickness with an accurate caliper. It's probably .004" thick. (If not, drink a different brand and try again.) Apply it to your .070" gauge with a tiny dab of sticky grease. Violá - .074" gauge!

If you're compelled to be more precise, spend $4 at Harbor Freight and cut a shim from the .004" feeler.

http://www.harborfreight.com/media/catalog/product/cache/1/small_image/160x/9df78eab33525d08d6e5fb8d27136e95/i/m/image_17655.jpg
32 Piece SAE/Metric Feeler Gauge
Item #32214
Only: $3.99