The problem with the outlet extenders that yogiboy has suggested is that they have very thin metal conductors. I have already looked into these. They are probably equivalent to 18awg power cords, and nowhere near enough to support good current for your electronic equipment.
If you are going on the cheap, you can find a heavy duty splitter short extension cord at your local Home Depot or equivalent hardware store. These have 12 awg stranded copper conductors. Here's an example:
https://www.homedepot.com/p/RIDGID-2-ft-12-3-Tri-Tap-Outdoor-Extension-Cord-657-12302RL6AP/302877755
You could spend money on an expensive power strip, but keep in mind it's always going to be a stranded copper cord. The Emotiva CMX-6 is a good one, but it has a 14awg power cord (not bad, but not the greatest either). Good in a pinch if you want just a little bit of line filter built in.
noromance has the best solution - and that is to build your own.
Though, it's actually probably best to expand your 2-port outlet to a dual outlet gang box (in the wall). Use 12awg or 10awg solid-core to chain the two outlets together.
And yes, upgraded outlets to Porter Port or something else is always good!