Yes Radio Shack sells HDMI adapters. However they are slightly more expensive there and a better solution is to buy them online because there you will get the same thing for maybe $5 rather than spending $30-$40 on a small HDMI adapter.
You can purchase a USB to HDMI adaptor at Best buy, Target, Radio Shack or Walmart. Best buy Is the ideal place to locate a USB to HDMI adaptor as they sell a variety of USB to HDMI adaptors to satisfy the needs of their customers.
Yes you can buy an international AC adapter. Radio Shack or Amazon.com would be two places to find this item.
There are lots of places where someone can purchase a 360 wireless adapter. Some of these places include, but are not limited to; Best Buy, Radio Shack, Amazon, and eBay.
buy a wiring harness adapter from your local Walmart or Radio Shack
Firewire USB adapters are carried at many electronics stores. Radio Shack carries a wide array of these adapters. Radio Shack stores are located throughout the United States.
Here is a picture of an usb to hdmi adapter "http://www.amazon.com/eForCity-Micro-USB-HDMI-Adapter/dp/B005NG71K8" . One can buy it for example on amazon or at the local electronic store.
A serial USB adapter can be found at any local retail store that sells electronic equipment. Radio Shack or Staples would be a couple of solid recommendations.
There are many places that you can buy a component to a HDMI device. Radio Shack will definitely have them. WalMart might, but they don't always have the right things one might be looking for. Best Buy might be another good option seeing as how they are an electronics store.
Yes, you can buy a cell phone at Radio Shack. Radio Shack's selection on phones tends to be a bit smaller than some other stores, but they do sell them.
Unfortunately, there is no known adapter that you can use to convert hdmi to dvi at the moment, but if you search best buy and staple, hopefully they will have some in stock.
Radio Shack
Radio Shack