I use a couple from JoAnns. One is part of a set of bags, Everything Mary I think is the brand. One of my rolling totes is from my dealer for one of my embroidery machines, I think it's a Blue Fig. My serger cases are square rolling soft sided cooler totes from a thrift store, the sergers fit perfectly. And one more thrift store purchase is a rolling crafters tote that my smaller machines fit perfectly into.
Cari