It looked like the calamity salvager only had a boatload of crafting materials, but it's possible I missed the goobbue in skimming through it. I did get my legacy chicken, and a couerl mount. I'm not authorized for the chicken (because of GC quests, I think), but the couerl works fine. I had to use the item to unlock it, then it's accessible under Actions and Traits > Mounts.