First off, yes they do stock more than just 1 lb bags. You can find a couple varieties of base malt in 10lb bags there, if someone hasn't snatched it up first. They don't have a lot of shelf space, so inventory goes quick. However, like I mentioned, they will order a 50 (or 55) lb bag of whatever malts their carrier has. If you are a member of the co-op, it is cheaper than ordering from Northern Brewer because of the shipping. If you can get a few people to buy at once and get enough for a pallet, it's even cheaper yet.
You can also get bulk honey in 60lb buckets if you make mead, too.
TB