Neat, though there's more than just that one I'm pretty sure. I think I have one squirreled away if I havent sold it years ago
Woah this is awesome to know! I'll add it to the book / rewrite it to add this to itThey were available even before that. You could get them from a villager NPC north of Daggerfall nee Port Silver, on the road eastbound away from the University of Altera. He was hidden inside a little hut near the water.
Interestingly on the northbound road from that crossroads near the University there was a little town with no residents but NPCs- a roadside attraction built by a bored admin. There was an NPC there who would buy and sell wheat, which you'd need for the long walk to the northern parts of the world.
This would've been the map Rota Magna and airships were on, I believe.