Boswell,
From the way he is carrying them, I would say they are not specifically a set, but that he is just carrying them both in his belt. Also by the differing leather work. BUT, all that dont matter so much to me. I like them too. The period they are reinacting is my favorite time period.
One of the fine makers here on the site can probably make you a set, but I also recommend checking with Ron LaClair and see what he has. Lately he has shown us some reproductions of cutting tools from this period and they look great and the pricing is very reasonable. Lin