Right now I have them side by side sitting normally atop Ayre myrtle blocks on a regular floor amp stand (the two fit nicely.)

If you have a photo somewhere of the stand for sideways placement I'd love to see it.

I'll have to hunt some down and get some pics for you. No idea where they are after the move!

Guys, a friend makes a wood holder for the Codex (we both work with wood) and it's a beautiful look. Classy. He sells them through his NJ Ayre dealer in Verona (Hope I'm allowed to say this. delete if not). I bet he would be more than willing to make a great looking myrtle stand to hold yours on their sides. It's very easy to fabricate.

An old thread, but I wanted to add my 2 cents.
I bought the Ayre Codex cradles that Ctsooner mentioned, and they are very well made, look nice, and do a great job keeping the Codex stable when I plug in the AQ Thunder Power cable-which is something of a monster by itself. I did need to use a right angle connector to get things to behave.
@OP.
If you do consider putting the amps sideways, I would give either ctsooner or myself a PM, we can give you the name of the guy.
B