John,

 

Airway Inc manufactures all sorts of (plated steel and stainless) fittings and has an easy to use website that helps you find what you want.  See this link for a sample:

http://www.air-way.com/cs37frames2.htm.  Click on any of the fitting photos for available sizes and specs.  You can also navigate back to their home page from there for other searches.  However, you’ll need to find a local distributor (no direct sales).

 

p.s. I found a replacement for an $85 TCM turbo oil fitting for only $4.  Too bad they don’t make cylinders {g}.