I have discontinued stocking spare parts. I've made a personal decision to concentrate exclusively on modifications and repairs and will continue this indefinitely for anyone who requires servicing of their TiVo. This decision has nothing to do with the Seven/Engin deal to possibly release TiVo in 2008 but just a personal decision based on balancing everything else I do.
Leads, Remotes and IR Blasters can be purchased via George at www.eksys.com or other sources mainly on Ebay USA.
Networking items can be purchased from George at www.eksys.com or direct from 9th Tee if required for genuine Turbonet and Cachecard items. Cheaper Turbonet clones that are 100% compatible and work just like a genuine Turbonet can be purchased as per the details in this OzTiVo Forums page: http://forums.oztivo.net/showthread.php?t=1547
Regarding wireless, it is generally accepted that the "de-facto" standard for wireless networking is to use a wired ethernet card (ie Turbonet, X-Factor or Cachecard) and buying a "Wireless Game Adaptor" (like those used on an Xbox or PS2) or a "Wireless Bridge" rather than using the Airnet as it gives far superior range and compatibility, and you can also revert back to wired ethernet if you ever have any issues with your wireless networking. Many companies including Linksys and Netgear and Dlink make WGA devices suitable for making your TiVo wireless.
Once again thanks for your support over the last few years.
Rest assured I am NOT discontinuing my repairs and modification services to the TiVo community.