Recessed Electrical Receptacles

To be clear, your problem is the socket to socket clearance, right? 

Hmmm.  Putting it in the floor creates issues.  I assume that is non-negotiable?

For Eric_Squires; Yes, socket clearance. For Carlsbad2; Floor is the only option. Walls have many issues that I cannot solve (e.g. Iso-max clips separate actual stud wall from advantec board which is covered in rock wool with fabric over). What would be the concern about floor located receptacles?

Also, I have been recommended to Oyaide electrical receptacles. Specifically, the SWO-GX Outlet. Does anyone have experience with this type of outlet?

Is the clearance issue up and down or side to side, or both?  May be worth buying a cheap outlet box and plugs from the HW store to understand the basic clearance issues first.

Sorry but I’m confused..Are talking the rough in boxes you stuff all the wires & recep into or are we talking the distance between each receptacle plug being too close together???
If it’s the plug spacing of the 2 sockets per receptacle, that is a universal sizing & nobody makes different...You can have your power cord ends replaced with slimmer versions,probably saving $ in the long run because you could use standard size rough in boxes & receptacles...
If it’s the rough in box I see 3 possible options.1:Have a look at Outside,rain proof boxes & see if they could be adapted for your purpose..2:Can you surface mount everything using Wiremold products?Wiremold also makes several different in floor boxes,maybe one would work?Good luck.