[MRCA] OT: round AC power entry module?

[W2HX]

Hello folks, I am building a project where I would like to use a 3 prong computer-style power cord. The project is built on a 2U rack panel. The typical power entry module is rectangular, and I cannot make a good square hole with the tools I have (or lack of tools).  Does anyone know of a model where the entry is round to allow me to use a step drill bit or otherwise? I guess I could use a circular military connector, but that really is overkill hihi.  Even power pole saw the benefit of making a round module which can be seen here:
http://www.powerwerx.com/powerpole-accessories/moisture-proof-splash-boot.html

I am hoping to find something similar for an AC entry, the kind that normally looks like this, but where I can drill a round hole:
http://img.directindustry.com/images_di/photo-mg/power-entry-module-13665-2442677.jpg

any suggestions appreciated!

73 Eugene W2HX

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