Creative case for portable typewriter?

I got an Underwood 320 (basically an Olivetti Lettera 33) for a good deal but didn't come with a case. Which is fine actually- I was thinking of getting either a hardshell briefcase which I can carry some supplies in (paper, pens, paper stand, etc.) or a 1960s/70s hard travel suitcase (the ones that are a bit squarish).

Wondering if anyone has gotten creative with cases for the portable typewriters/ how often you take them out? I'm looking for something a bit robust that I can take my Underwood around with my to the park or across the city on public transportation