I too have big feet. I wear 15 4E’s and my feet seem to be high volume. I tried some Altra’s, but they were tight in the toe box, and way too narrow across the arch and heel.
The New Balance Leadville’s were great shoes, and like many, I was sorry to see them drop these from their lineup. I have been using the New Balance Summit KOM’s lately. I like the more supportive upper on the KOM, but I prefer the wider toebox on the Leadville, and I think the Leadville was far more breathable as well.
I have been considering getting the Fresh Foam Arishi Trail, but I have my doubts that this will be a suitable replacement.
One thing to note, if NB does not list a size on their website, it doesn’t necessarily mean you won’t be able to find that size elsewhere. NB website only lists what they have for sale at the time. But I took a quick look at Amazon and Zappos and didn’t see the KOM’s available in 4E there either.
Before I buy new shoes, I always check Joe’s New Balance Outlet and do a quick search for my size. I have bought some pretty cheap and awesome shoes from there. As one who hasn’t bought shoes from a brick and mortar store in over a decade, it is pretty nice to find deals on shoes that fit my monster feet.