The last five years have seen a renaissance of merchandise related to Disney's Haunted Mansion, hearkening back to the glory days of amazing fright masks, magic tricks, and novelties from Randotti (my personal faves).
The new Mansion merch has a decidedly different valence (dog costumes, Christmas ornaments, metal puzzle-models, etc), but there are some really inventive and outstanding pieces (I'm honored to have played a small role there!).
Now, Her Universe (previously) has released a characteristically great, thoughtful and good-looking line of Haunted Mansion clothes, with all the flourishes we expect from the company, including plus sized versions.
Haunted Mansion [Her Universe]