Went to hobby lobby last night to buy a swivel knife. I had seen it a couple of weeks ago when I was in store looking over other sections than the modeling section, to see if there were items there that would be useful for modeling.
In the paper cutting session, where I found the item before, I found the blades but not the knife itself. A salesperson showed me where the knife would have hung, but they were all out. She said she thought they sold them in the modeling section, so I went over there to look, though I had not seen them before.
I indeed found what looked like swivel blades (X-acto brand), and finally found the knife- it looked almost like other X-acto handles, but had a hole in the chuck, not the simple x-cut. And, it was considerably more expensive than the Fiskers knife in the paper crafts section. Also, it did not come with any blades, while the Fisker item did include a few blades.
I picked up a jar of paint, and as I was approaching the checkout, the salesperson found me and said she found three more Fisker knives. Bought one, will try it out and report back here on how well it works.