Pen,
The head is a bit smaller and the whole thing lighter, but short of finding the Norlund at a decent price, or buying one of Lee Reeves' the "Fort Meigs Nessmuk" axe sold by
www.ragweedforge.com is a very nice, and cheap substitute.
It is a cast head though. He offers them in 410 steel the whole head hardened, and 6150 with he zone hardens. The cutting edge is like 2 1/8 " versus like 2 3/4 for the Norlund I think. I haven't done a tremendous amount of cutting with mine yet, but the edge seems to be very durable on both models and not just shaving sharp but razor sharp! So sharp in fact it's a little dangerous.
He does up the bits like Nessmuk, one thin and one thicker, but both are wicked sharp. The whole thing is 14" long and 15oz. The handle is I think going into the head, maybe 1/2" but it is wide and the handle is good quality.
I chopped like a 7 or 8" really tough elm log and a few passes on the strop and it was shaving again.
I'm taking mine on a 4 day backpacking trip this weekend, for firewood and to cut fuel for the new Sierra Zip Stove I bought, so I'll let you know how it performs but it's a good alternative!