I bought a two level case with wheels when they first came out. It was $65 but well worth it. The bottom case holds the machine and I stick a couple of styrafoam packing pieces on the sides for added protection.
The second case is the same size and sits on top. It buckles to the bottom case and can be removed. It's large enough to hold everything but a long ruler and a cutting mat. Had to rig something up for that. For an overnighter, there's room for PJ's and clean undies. It has held up well for several years and has gotten a lot of use.