I've also thought it. I chose the combo because of the thought of it being compact and in one piece and all that, but the weight is unreal and in contrary to Monk, I am a weakling. So carrying it generally, by the handle isn't even an option for me. :lol:
A empty headsheel and speaker shell form Mesa here would be economically destructive, not to mention practically impossible to arrange. However, one could go the custom made-route and have a short headshell made for it, perhaps. Like this one:
Or even a short/compact 1x12" combo like this one:
These could perhaps even be ordered from Mesa, if you have the money, but I'm considering talking to George (gts) and see if he could make me a short Lonestar head. They're basically the same dimensions as the Mark cabs, only with a slightly different front, which one could measure. I'm sure it wouldn't be a problem. I already have a EV 12L loaded thiele made by him, so I'm strongly considering it.