I have the original power cord, I believer they're called IECs that came with myvStage. I have a number of basic IEC cords like around, that lots of devices use and I'm sure they would work.
However, the kemper one has a bulge near the top that perhaps covers some circuitry? Like some sort of protection or something? I kind of want leave one cord under my desk and keep one in my go-bag, but wanted to make sure there was no need to purchase a special cord. But, if there's some benefit or protection, I have no problem buying another.
I saw some threads about there being no need to buy a fancy cord to improve things, didn't see anything about whether it's advisable to use the one that came with the KPA.