Wesco
Mister Lou
Baker's Boots and Clothing
I think these are some of the best looking engineer boots around that are easy to get your hands on. I've wanted engineer boots for a long time. They have a western aesthetic with pirate swagger. They're just SUPER cool. I'm not sure what type of engineers wore these when the style was invented, but the name was good enough for me to wear them to work in commercial construction.
I emailed AND talked with a human being or two about sizing. I referenced my Whites and Nicks models. Those 11.5Ds led them to recommend these in 11E. It worked out!
Online/over the phone. Bakers is a great retailer.