I found a Blue Label Stencil Catalog from 1900 and I feel like I hit the jackpot, since I recognize quite a few of these from designs that are currently available.
CraftHome for $34.95.
CraftHome for $48.50.
Anyway, you can still buy this stencil design from a couple different websites, the least expensive being CraftHome again for $34.95.
The Stencil Library in the UK for £10.75.
This stencil catalog had some pretty nice designs. While I was digging through it, I grabbed some screenshots and I include some of them here.