Auxiliary or Boost Pumps in 2024

[YankeeClipper]

I haven't seen a thread about this since 2010, and wondered if someone might know where to source a pump for a 69 Delta model.

First thing I'll note is that when I look at the parts manual, I see a cryptic figure index #20 which says Pump-Auxiliary fuel --- Attaching parts. Yet it points to what looks very much like a pump in the picture, and that number 1426033-3 matches what was said in the 2010 threads.

I've had no luck trying to reach any of the named or linked providers there. I see a lot of chatter about the 18000-b which is (probably) readily available from any number of Weldon pump resellers.

Here's the rub: the PMA does NOT name any model before Echo, of any type. So my IA said he can't put that in, because god forbid an accident occurred--even if unrelated to that part if investigators took notice of it he'd be in hot water.

Know where to either find a PMA for a Delta model, or just a reseller with the right part number?