the ribbed corners is what is patent. Notice on the Hifonics, it is not used. IF you plan to build these, or have them built, I'd suggest not using the ribbed surround. It would throw up red flags asap back here at the plant. Being in Asia, I'm sure you can find the surround either way. I'd just suggest not for possible, legal actions.
A plant will do about anything you want, but YOU will be the one held responsible.