Honestly while I love Brand accessories and what not, I really like like hand made items a lot more. So basically when I get bored or really need to find something to go with a coord I head over to my good old stand-by Etsy. Seriously some of the cutest accessories I have ever seen come from just searching "sweet lolita" on Etsy and browsing through PAGES of stuff. Its fun, and for the most part relatively inexpensive too.
You can of course refine your searches a lot more than I do, but a lot of the time I have no idea what i am actually looking for. I also really like looking for supplies to make items I have found at places like Walmart, Layne Bryant, Avenue and the like loliable. You can always search stuff like "decoden supplies" which comes up with some of the most adorable things I have ever ordered. And on a side note, a lot of the time just buying the decoden supplies or the supplies to make things more loliable is a lot more cost effective as well! And who doesn't like to save money?
The one thing I don't really like to look for on Etsy is clothes, it seems to me for us plus-sized girls the fact that we are going to buying something that may not fit is a bit scary, so honestly I just tend to stay away from more of the pre-sized clothes that the sellers post. Like one specific person style? Thats awesome! But why not try messaging them and asking if they would be willing to make something custom for you instead? It just seems the safer route to go, just so you don't waste your cash and get something that doesn't really fit. If possible have someone make something in your exact measurements, guarantee it fits, and be happy with the design! Its all win win.