If you can't or don't chose to do it, I'm quite certain any roofer or most carpenters would be able to do it. Just draw out a sketch, let them know you want the opening to be 6 sq feet minimum and that both sides should open. It's best if each side open equals the 6 sf in case a breeze from the wrong directions makes you open just 1 side.
I don't think the one you referenced would be a good choice.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.