That is what I was thinking it would work great for. I picked up a package, though they are not the magnum strips. I picked them up at the sale shop at Orvis Manchester (VT). No one wanted that color it seems, so they had a few packs available. Checking out the Hunters Fly Tyers Catalog they don't offer them in blue - I thought they would. So, I would recommend getting a tanned white skin from the craft store and dying it with RIT blue or another dye. I'm sure an olve back would work pretty well to imitate a herring as well.
Bob, if you want me to send a few strips email me your address.