There are many resources for shoes that fit wide feet. Easy Spirit, SAS, Rockport, Cloudwalkers are but a few names.
You can do a search on Google for women's wide width shoes. Zappos.com is another Internet resource.
It is not good to get a longer shoe for a wider foot. The widest part of the foot should fit the widest part of the shoe. When you put a 9 length in a 10 1/2 they do not match up length wise. You need to look for better fitting shoes- they are out there.