3/8-24 glow plug compression test adapter?

I'm wanting to do a compression test on my early-series diesel JD 2010. The glow plug threads are 3/8-24. I've scoured the internet looking for a diesel compression tester with these threads but haven't had any luck - - most are metric.

Does anyone know where a 3/8-24 glow-plug compression adapter can be found? Thanks.
 
I've made quite a few in different standard, and metric, sizes using a bolt with a hole drilled through it and an air fitting brazed to the head/hex end to hook my tester to. Their really easy to make, and work just good as a factory one, when your in the field and need to do a test and don't have one the right size.
 

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