Topband: 5V 3A Wall Wart Recommendations?

[Joe Subich, W4TV]

Having just begun a noise mitigation project, I've found
two of the biggest sources to be a pair of wall warts for
the USB hubs attached to my radio and office computers.
Removing them dropped the noise floor by 20 dB on both
160/80 (and by about 10 dB on the other bands).

Does anyone have a recommendation for a source of *quiet*
replacements (preferably with 3.5 x 1.35 mm coaxial plug)?

73,

    ... Joe, W4TV