where can i find a wireless network adapter for my Tivo?

Connect your TiVo Series2 DVR to your wireless home network with thisTiVo Wireless G USB Network Adapter, and enjoy TiVoToGo, multi-roomviewing transfers, music and photos served up to your television, andeasy online scheduling of recordings. If used with a broadbandconnection, it also eliminates the need for a phone line. With theTiVoToGo feature, you'll be able to transfer programs from your TiVobox to a Windows-based desktop or laptop PC. It works with 802.11g and802.11b wireless networks.
Features

• Easily connect your TiVo® DVR to your 802.11g or 802.11b wireless home network
  
• Enjoy TiVoToGo™ and Multi-Room Viewing transfers, Music and Photos, Online Scheduling, and more
  
• Eliminates the need for a phone line, if used with a broadband connection
  
• Optimized wireless performance with your TiVo® DVR
  
• Real brushed metal base; flip-up antenna with TiVo badge
  
• For use with a TiVo Series2 or Series3 DVR only. Not for use with a TiVo® Series1™ DVR (with no USB ports) or DIRECTV DVR with TiVo®. Not intended to be plugged into a PC or Mac.

Here are the best Tivo Wireless adapters.  You don't have to pay much at all for a good one.  I would suggest the Macsense AeroPad Wireless Adapter if you have a little more than 50 to spend, else I would just go for the AG0100.  All great deals!  Check Walmart for best prices on these.