Ebay has quite a few Harley Quinn costumes. http://www.ebay.com/sch/Costumes-Reenactment-Attire-/163147/i.html?_nkw=harley+quinn&_catref=1&_fln=1&_ipg=&_trksid=p3286.c0.m282 She can also try to make her own costume.
"Harley Davidson itself has its own brand on watches, but you won't find them at the retail stores where they sell their bikes. You can find them on their website and even in mall stores."
You can find Alice in Wonderland costumes at many stores that sell Halloween costumes. Or you can order it from the internet. Some stores that sell that costume are Party City, Walmart and Target.
You can find costumes to be a saloon girl on eBay and Amazon. Also, some online stores sell this costume: Costume Craze and Costume Super Center. Target is also a place you can find it.
If you would like to do your halloween shopping online, I would strongly suggest going to Ebay or Amazon. Also, most costume or party stores have online stores as well.
Harley air cleaners can be purchased from many online stores. Some examples of stores that sell Harley air cleaners include J&P Cycles, Bike Bandit, and Cruiser Customizing.
Macy's sells lots of Harley Davidson gear, including watches. You can also buy Harley Davidson watches at many of the official Harley Davidson stores.
You can find most of them at any costume store.
Costume and some party and novelty stores sell costumes throughout the year. Stores like Target and Walmart will sell costumes at reduced prices after Halloween for a short time.
you have to make your own, not sure if they sell any in stores
Many costumes sell wigs at Halloween. Stores like Walmart and Target will have limited selections. Some online stores to check would be Wondercostumes and Amazon or Ebay.
You can buy costumes in Oahu for Halloween. There are many costume stores and retailers that sell Halloween costumes in Oahu.
get some creativity and initiative and it wouldn't be to hard, if your looking for alex's droog gang getup they sell it in costume stores and online