Just type 'tc-80n3' into ebay, you'll get a few hundred results.
Apparently the Link Delight ones aren't so bad for $20, google that and you'll get a lot of happy people. One major difference though is that the Link Delight ones don't have a locking plug, so it may fall out occasionally.
Still, cheaper than the genuine version (that said, I got my genuine tc-80n3 off ebay, 2nd hand for about $50).