So far I have the winter souvenirs, and a display with MLC's Christmas Garlands
"boxed up" and buyable from another custom souvenir rack. The boxes on the middle shelves are the buyable ones. The others are just for looks. This set is the bush "net" lights and the swag.
Both work just like BV souvenir racks (and require BV). Sim goes, picks which of the two they want, buys, then it's in their inventory.
Since the garlands have recolors, when you click to choose one, the color options pop up, but they aren't actually selectable in the store. But it is still fully changeable once you put them up at home
Edit: I've just realized, looking at these pics together, that I need to revamp the box textures on the first one