I recently found an old school brass 150mm "American Scientific W.A." lens for next to nothing.
Says 6 1/2 x 8 1/2 on the barrel. But covers 8x10 well and is REALLY wide. :)
Using a wide lens in a natural looking way can be difficult, you've done a great job here, Matt. And I really like the feeling of light in the Power Plant shot as well. All the best. Shawn