I don't know how many 1099s you do, but that seems like a lot of extra work and a lot of wasted 1099 paper. For now we're sticking with doing the 3 per page B,C,1, mailing the B and keeping the others as our file copies.  Once we run out of 1099 forms then we'll have to rethink our approach, but for now this seems like the best temporary solution.