Now, that's annoying. Wish I could help ... I guess a call to the dealer on Monday? I had to get a connector/ harness from a junk yard a couple years ago. Some manufacturers have them available -- like MB .. others are really bad.
Your wiring diagram manual has the part numbers for the connector shells (though it will also have a note that not all possible shell part numbers are orderable). So far I haven't had trouble looking up a shell part number and ordering it, either at the local dealer or one of the online ones. Generally it won't be in stock at the local dealer so there will be shipping time involved either way. As for the metal connector terminal inside the shell, the wiring diagram manual doesn't have those part numbers (at least my 2001 doesn't, maybe they've added that info in later ones) but the dealer part counter person can look them up after you give the part number for the shell. The way Toyota sells the terminals (at the dealer part counter) is: already crimped onto a few inches of the wrong color wire, which means you don't need a special crimp tool, and you're able to cut out up to a few inches of damaged old wire and make a splice further back on the harness. If you have a crimp tool and you would rather just crimp a new terminal on the wire for a less goofy looking job, you're sort of out of luck ... the Toyota parts counter won't sell you just the terminal. At least, they won't sell me just the terminal. So, I go to my local independent auto electric shop and buy the plain terminal from him. He says he buys them from the dealer ... same one who won't sell them to me. -Chap Edit: the diagram manual also has pictures showing how the shell's retention catches work, so you can get the old terminals out and the new ones in. For some of the shell designs it's pretty self-evident, and for some of the others, not so much, but there's always a way.