Technical Oddball Fuel line fitting source?

Any recommendations for a source.
Trying to find a straight internal female flare fuel line fitting for 5/16" steel hard line.
(1/2-20 tube nut size) to 3/8 NPT. To plumb in a Holley type fuel pressure regulator.

For a 57 J2 Olds factory Tripower that has too much fuel pressure.

Only thing I can find so far, is a fitting for 1/4 NPT. Don't want to have to use a bushing reducer if at all possible.
Getting too bulky for the space to fit the regulator.

Have looked at all the normal sources of catalogs from Dorman, Edelman/Plews, Gardner/Wescott etc. and no luck so far. Sources like Auto parts, Summit, Jegs, Speedway, Grainger, McMaster-Carr etc, no luck.
Not sure that fitting even exists?

You guys have any ideas?

Bill

 

@justpassinthru

Aerospace/ Aviation parts manufacturers, Some European .
Parker
Aeroquip
Pluming in Industrial Beverages

many of these companies have several specific different catalogs ,

also Earls or Russel has a special fitting catalog that's not common seen ,
& Vibrant has some unique fittings also
Catalog Not there web site .

 

Bring in the pieces to your nearest Parker Store (there should be a bunch scattered through out the Chicago Land area). They will be able to put together what you need.

 

A "face bushing" doesn't really add any length to the fitting, give it a try



notice that they have them at Ace Hardware...

 

www.polyhose.com. I ordered some odd ball brake line fittings that nobody had through them last year. They have all kinds of automotive type fittings

 

I would agree on the earlier suggestion of aeroquip, earls, russell, or xrp or possible sources

Lynn

 

All so having sets of NPT tap / die you can sneak up on deeper depths to make
Fitting shorter , more Flush

 

Local NAPA dealer may have something.

 

I've had good luck with "one-stop shopping solutions" at your average hydraulic parts and service storefront in Anytown USA.

 

Last -5 inverted flare I bought was from Earls. I bought 2.