This is a nascent market, but 60 Works does share it with a few others. Here are some alternative outlets that could help contract a custom controller:

• custommidicontrollers.com: I know little about these folks, but the owner is a friend of a friend, and said friend (Moldover) vouches for him.
• Livid Industry: This is the OEM/Custom arm of Livid Instruments, maker of VJ/Music controllers and DIY MIDI brains.
• Craig Dorety: Another friend of a friend (Moldover strikes again). Craig has taught classes on making MIDI controllers.
• The Midibox Forum: The Midibox folks are staunchly anti-commercial, but you may be able to finagle a relationship with a forum member for a custom project. There are some hoops to jump through to acquire permission.
• DJ Tech Tools: They offer customized versions of their popular MIDI Fighter controller.

Why are you sharing this information?

60 Works is trying to attract motivated, educated customers. Comparison shopping is a business reality, so we will not stifle it.