Extremely hard to find somewhere that will thread 1/4 pipe. It just isn't done. Smallest threaded pipe size is 3/8. A fully equipped machine shop could probably thread 1/4 rod. Same goes for 1/4 fittings, you would need to find a specialty supplier. 3/8th and up fittings can be found at any plumbing supplier like Noble, Emco or Bartle & Gibson.
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