Sorry, but I found my macnuts at Publix grocery store for $10/#, and that's good enough for me! They're not organic, and they're salted, but this process is ENOUGH trouble without the need to crack the nuts!
I will not, though, make a double-sized loaf again. It's too soft to grill up "big and strong" like gluten-y "real" bread, so the big slices are no benefit.
This batch did come out wonderfully smooth and tasty, though, and has been great for holding my meats, cheeses and mayo together!