I asked the same a few threads ago, but for a Roadster head.
Anyhow, I've have a Audiopile/EWI case for my Mark V that's built like a brick sh!thouse. Unfortunately, they don't have one for any of the Mesa heads. So, I ended up giving Studio Slips a try. I have yet to receive it and run it through the ringer but I'm hopeful that it will suit my needs. Good luck!!