Jer, I set up a couple high pressure wash trucks, and utilized these fittings on some equiptment. They seem to meet your size requirement. They are through Enco, (
www.use-enco.com). In thier catalog it is on page 836, upper left, labled 90 degree swivel, heavy duty swivel. They are made in the USA, and are available in Brass or Stainless, with available rebuild kits.
The 90 deg.Brass part # 891-0337, is rated at 3000 psi for 19.99 each, the 90 deg.Stainless part# 891-0338, is rated for 5000 psi for 29.99 each. The repair kits part# 891-0339 are 8.99 each.
The stright/inline swivels are rated 2000 psi. Brass #891-0342, and 3550 psi. Stainless #891-0343. They list two sizes 3/8" and 1/4". These are also shown on page 836, and made in the USA.