For those in the US who are close to a Meijer store, I discovered today that they have a decent alt for Rose's "Boomtown" scarf.
Apologies for the somewhat bad cell phone picture, but you can see that it resembles the Forever 21 alt from last year. The price was $18 (maybe a little steep for some), but definitely competitive with the price of the original if you can find it. Brand is called Massini, and seems to only be sold in Meijer stores.
I looked on the Meijer website, and it's not yet listed. If you want to order from there, you might want to keep an eye out to see if it pops up.
Hope this helps some of you!