I don't have that machine, but I made my own rolling embroidery machine bag. I used a folding hand truck and made a bag that would fit on it. I made a flap on the back that would Velcro around the cross member of the hand truck. And I made a separate strap like the ones you put on a suitcase to keep it from falling open that I put around top to bottom to help hold it on the hand truck.
The benefit of the hand truck is that it has bigger wheels to travel on uneven surfaces or up/down stairs vs the purchased rolling tote bags. It also means I can put my machine/bag on the seat and use the seatbelt to hold it safely and fold the hand truck and put it on the floor.
If you want more info, PM me.