Just found a guy selling the Wii LAN adaptor on eBay for Ã‚Â£29.00 inc P+P.
Waiting for mine to arrive in a few days. At last I’ve got one.
There are the official Wii Japan version, but they work on any region Wii.
Here’s the link: Nintendo Wii – USB LAN ADAPTER **IN STOCK**
He’s got 2 left.