Hello!
I hit Iskaara rep level 26 and chose the Tug Sled as a quest reward. I saw the other sled on both Murik and Kiopo but didn’t have the materials to buy it on that character. I logged onto some alts, mailed things around to the original character, and logged back in again.
Looking at both vendors after a relog, the other sled is entirely missing from Murik and Kiopo no longer has an option to sell anything.
I’m unsure if this is an either/or problem with the “Slacking and Sledding” quest rewards or if’s specifically the snow sled as I’ve only done it on one character.