https://www.audiocircle.com/index.php?topic=144678.msg1573459#msg1573459
You could build your own using less exotic materials than this design.
https://www.vhaudio.com/hotbox.html
Or you can just buy a commercial power strip and swap out the outlets to something of your liking and/or remove the power switch as interested.
https://www.tripplite.com/waber-by-tripp-lite-6-outlet-75.9mm-center-spacing-industrial-power-strip-6-ft-cord~6NX6
Just curious, have you ever popped the cover of those outlet strips? The reason I ask is because I have done so with the Tripp-Lite Iso-Bar products (which I think are excellent and for a 2-outlet unit, is about $40, 6 and 8-outlet types are still under $100) and they use outlets that don't have screw terminals, but instead straight wire ones that are difficult to remove.* Basically the associated parts for the outlet bar are mated to the outlets in such a way that you cannot remove the outlet to make a swap or upgrade to the outlet due to no way to "get in there" to disconnect the OEM outlets (the connections to the outlet are almost in the middle of the back of the outlet). Although they are not soldered directly to a PCB, they are effectively "equivalent to soldered" directly to the PCB.
Maybe those outlet strips just use plain wire, which might make it easier. But it's a bear to try it with the Iso-Bar suppressors (which have noise filtering along with surge suppression).
One other issue with that approach, if it's doable, is you have to insure you get something with conventional "oval" outlet profiles; many are "decora" type or snap-on, and you won't find suitable upgrade outlets in the non-oval form factor, or at least not many and not as inexpensive as typical "hospital grade" outlets like an 8200 series. Not impossible to deal with, but the old style shaped outlets are becoming less common on commercial power strips and seem slated to be discontinued going forward.
If you do decide to try an Iso-Bar unit, note that new ones are decora (square) types, you have to search for used ones to find the old-style oval outlets.
* You can't blame them, this type of outlet is less expensive than one incorporating screw terminals (or both, which is quite common these days), and easier to deal with in manufacturing.