I found an old EuroLite CD case in my gear closet, pulled out all the CD spacers and the MPC Live fits almost perfectly in the X/Y dimensions, with a single CD spacer on the right to subtract about 3/4 of an inch from the width. Pretty sure this is the same as my old old old case that I've had for years:
http://www.procases.com/products/stock- ... -row-casesThen I discovered that an old Nintendo Switch box fits perfectly underneath the MPC, inside the case, to raise the MPC so that it fits just within the closed lid.
I'll need to add a little foam padding on the sides, as well as some shaped padding in the lid to fit the top around the knobs, but I seem to have discovered a reasonable hard case solution, plus I can put all my cables, power supply, headphones, etc in the Nintendo box underneath.
I also might spray paint or otherwise cover the Nintendo box so that it isn't a "colorful distraction".