Wall wart removal...why no products that can handle multiple devices?

Pro-Ject Power Box MaiA DS2

Output voltage / current (socket diameter): 2 x 9V / 2A max (1,3mm) 3 x 18V / 1A max (2.5mm) 1 x 15V / DC-turntable (2.1mm)

If all your wall warts share the same voltage you might be able to rig together something out of a single Astron bench supply.  :-)

Keces P8 8A Ultra Low Noise Linear Power Supply has dual output plus a 5 volt usb.

I believe you are looking for a Wyred4Sound PS-1.

There is a base unit which you can add up four additional outputs with different voltage ratings. Three regular 1 amp outputs, plus one high current 3 amp.

I'm not sure if this is something that would work.

i found This after browsing around but I'm really not sure what I need. I can see an issue is that all of my barrels on the wall warts are not all the same size. 
 

however I'm sure they could be spliced. 

I've used these. Linear PSU

I bought an HD Plex unit precisely because I wanted to have  the ability to power more than one device. The hard part is getting the proper cable terminations, as each wall wart has differing sizes- Which HD can provide, but measuring them is a bit of a pain.

Bob