Magical items in Barovia are extremely rare and valuable, and the module has few to spare. Fortunately, Dragnacarta created a few lore-friendly gifts that can aid the PCs in Curse of Strahd:Reloaded. I've made some illustrations of how I envision them, just in case you or your players would benefit from having them as handouts or as a way to keep track of who's carrying what when they eventually vanish without a trace...
The items are, in order, the Keeper's whistle, Van Richten's talisman of echoes, and the twilight crest, an ancient and curious artifact Strahd can give to the players on Yester Hill. All the stats for these items can be found in their respective sections at https://www.strahdreloaded.com/.