QUIET external low-pressure electric fuel pump?

Mad Dart said

With or without a return line? Without a return your choices are limited.

With return line I use a Walbro GSL-392 High pressure pump with a Mallory 1407M Return style regulator. Pump is super quiet and fuel pressure is dead solid and does not move at 6.5 PSI. Good for an easy 600whp in a Natural Aspirated application.

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I also use the GSL - 392 walbro it is very quiet well you can barely hear it with the engine off rock steady fuel pressure .and you can also stack a bunch of them mad dart has some great pics of his stack of 392's here is a link where I got mine http://www.gsl392.com/ .
I will just say it is a lot better than my aeromotive pump that only lasted 1100 miles and I couldent hear my 416 when it was running .