Try the Oriental Trading company. ( www.orientaltrading.com ) They have a large variety of cheap party supplies and other novelty items.
The only time you will need monkey birthday party supplies is if your kid like monkies, or if you have a monkey pet and is its birthday.
Party America USA sells a line of monkey birthday party supplies. They have outlets in most cities.
If you visit PartySuppliesWorld.com I am sure you will find the party supplies you want.
http://www.thepartyworks.com/ is a great place to find birthday supplies.
Yes most would find a monkey party to be fun.
You can buy cheap kids birthday party supplies in Philadelphia at the national chains such as Party City or Toys R Us. Both have large selections and good prices.
Oriental Trading Company is a online and mail order party supply company offering party supplies in many, many themes including monkey and jungle themes. They have very reasonable prices as well.
You'll find a line of monkey-themed paper supplies at http://www.shindigz.com/party/Monkey-Tableware.cfm Also, go to http://www.birthdayexpress.com and enter "monkey" in the search. You might find this site helpful, too: http://www.toppartyideas.com/mod-monkey-party/
You can buy monkey brithday party supplies at toppartyideas.com.
You can find cheap party supplies for almost any theme at Birthday Express. You can check out what they have to offer here: http://www.birthdayexpress.com/
The Jungle Book theme would be a good one for a kids birthday party. Monkey themes are really not all that popular when it comes to birthday parties of any age.
You can find monkey party supplies from a variety of online vendors, as well as stores. They have many party supplies, tableware, and other items to make your party ape-tastic! http://monkeypartysupplies.org/monkey-party-supplies/