To get custom IT cables just contact one of the many companies who provide this service. Some examples of reputable companies would be Allied Wire and Cable (awcwire.com) or Custom Cable Corp (customwireandcable.com).
They likely have a long term relationship with a company who creates the custom cables they need on demand.
The Telecaster Custom is an electric guitar that is manufactured and sold throughout the World by Fender. One could find further information about the Telecaster Custom guitar on the Fender website.
brake cables
Custom wooden signs are usually manufactured by a wood company. Come to the shop and ask. If that doesn't work, scour the local carpenter's shops. Good luck!
You can find custom cables for musicians and music production at www.rpmseattle.com/seattle. Another good source is www.RamElectronics.Net
Why not try the Apple Store at San Francisco? Other computer shops in your area should also carry custom cables. If not available, ask them if they can order a shipment for you.
Somewhere is another Galaxy far far away
There is a an aluminum custom fabrication company in Detroit. Aluminum Supply Company, Inc(ASCO) is located in Detroit and offers custom fabrications.
His eyeglasses are manufactured in Japan.
Fodera Bass guitars are custom instruments manufactured only in Brooklyn, New York. They also offer many assembled custom guitars for sale in their shop.
The Proton Savvy is manufactured by the company called Proton which is a Malaysian company. The Proton Savvy is a supermini hatchback and is manufactured in Malaysia.
I found a good website that makes custom wristbands. I just did a google search for custom silcone wristbands and found this site http://www.wristbandswithamessage.com/
You can call the company that installed the cables or any company that installs fiber optic cables. It's always a safe bet to call a professional before digging in a area where you think there may be cables buried.