Hopefully this can be a compilation of the decent wig shops in Taiwan. I've only shopped at one before, and have had decent success with it. Their prices are slightly lower than some of the US ones, but not by much. The quality is wonderful. Anyways, here it is:
CC wig shop
(this one you'll have to contact a buyer in Taiwan and they'll buy it for you)
(Although they sell wigs, they also style the wigs in the store for a fee. Bringing in your own wig is optional. )
(AKA the eBay of Taiwan)
Feel free to share your reviews and where you shop for wigs and I'll update this post! Hopefully it'll prove useful for people.