There are many sites online that offer web capes. Online stores, such as Wondercostumes have a small selection. You could also try Amazon or Ebay for web capes.
Believe it or not you may find fairly good instructions on how to make a web cape on Martha Stewart.com.You can find good examples there of both children's and adult's costumes.
You can find web capes in stores at Party City! You can also find them at Amazon and Ebay as well as most other online Halloween Costume retail store!
You can find good online web design schools at: www.ComputerTrainingSchools.com
Ebay is probably going to be your best bet. They always have a ton of costumes and costume accessories for you to choose from.
The web address of the Cape River Heritage Museum is: http://www.caperiverheritagemuseum.com
The web address of the Cape Coral Historical Society Museum is: http://www.capecoralhistoricalmuseum.org
The web address of the Greater Cape May Historical Society is: www.capemayhistory.org
The web address of the Cape Charles Museum And Welcome Center is: http://www.smallmuseum.org/capechas.html
There are a few online websites where you can find web standards. These websites include The Web Standard Project, W3C, W3Schools, and the Web Standards Group.
The web address of the Museum Of Cape Fear is: http://museumofthecapefear.ncdcr.gov
There are many online schools which provide courses to gain certificates in web development courses online as well as web design. They may slightly differ so you should find the one best suited for you.
http://www.archive.org/web/web.php