I don't have a good answer - I have one I got for Christmas last year but the telescoping handle is really fiddly and made of plastic so I don't think it's going to last long. I kind of like the idea of just making a large, well-padded soft bag for them.
Before I had this case, I would just make a nest of quilts in my trunk when I had to take my machines anywhere. I still do that when I take my big machine anywhere as it's way too large for the case I have. One quilt goes under the machine, another on top and wrapped over the sides, and the whole bundle sort of wedges into my (tiny) trunk nice and snug next to the wooden box I keep in there. It's still "naked" when I'm actually carrying it around, but that's just from the car and back, not a big deal.