I doubt it !... A 'custom' desktop - is one made to the specific requirements of the customer. It is highly unlikely that a computer shop will have a machine with the exact requirements to meed your needs.
you buy them in the app store for $0.99
One can buy custom notepads at your stationary store, like Staples. A dedicated agent will be happy to direct you to the level of customization that you would like.
Desktop gadgets can be purchased online at many different vendors. The sites with the largest inventory and variation would be an electronics store such as Best Buy and Radio Shack.
Online or at an Apple Store. Yes, there really are large stores that are not online that are called the Apple Store.
The store in the link below does custom cosplay work. you can try online cospay store your-cosplay.com
Wireless cards for a desktop computer can be purchases at any computer store, either online at MacMall, PCMall or NewEgg, or in a brick and mortar store such as Best Buy or Fry's Electronics.
Custom frames can be purchased either directly in a store or online. There are custom frame stores available on the web and many will be available. Michael's Craft Stores do custom framing.
One can buy a custom BMX bike in Las Vegas from a few stores. One can get a BMX custom made from 'Just BMX', 'Bolder BMX', 'Bike World' and 'Vegas Bike Store'.
go to an electronic store like best buy and ask about PC batteries
Yes, your desktop manager can be rearranged and even radically altered. There are programs like RainMeter that allow you to make a custom desktop and desktop manager.
A Lenovo desktop is available at any sort of major electronic device store such as Best Buy, Radio Shack. A lenovo desktop would also be available at major retail stores that have well stocked electronics departments.
you can get custom embroidery at your local craft store or you could buy your own sewing machine and do it yourself, you would save more money doing it yourself.