Torans, bandhanwars, wind chimes and door hangings, in beadwork, brass, fabric and artificial flowers.
Available in the United States. No customs at your door.
A toran is a doorway hanging, and it is the single most recognisable piece of Indian festival decoration because it goes up first and stays up longest. Bandhanwar is the same thing by another name. They are made in almost every material: mango leaves traditionally, then beadwork, mirror work, brass bells, embroidered fabric and artificial marigold. Nothing about the format is seasonal, though the buying is.
Measure the doorway before ordering. Indian interior doors are commonly narrower than American ones, and a toran sized for one looks short across the other. Most are hung with a simple loop at each end, so adding a couple of inches of ribbon is an easy fix, but knowing in advance is easier.
If you are renting, plan the fixing. Almost none of these come with a way to hang them, and the ones with brass bells have real weight. Removable adhesive hooks rated well above the piece's weight are what most people use, and they are the difference between a decoration and a hole in the door frame you pay for later.