I have run into the weirdest issue I can think of - the upstream o2 sensor socket on my car is NOT the right shape to accept an LR001459 plug from ANY vendor.

No, the harness was not modified. The socket is original and is not damaged. It simply will not fit.

I have been told, however, that this problem is not unheard of and has happened to other owners, particularly with early VIN's. If so, which upstream sensor do I have to buy that will work??? 2008 US LR2 SE, 6-cyl gas