I have a set of brand new in the box TRW (one of the O.E. suppliers to BMW on this part) outer tie rods for E39 M5 and 540i V8 models. BMW part numbers are 32211091723 and 32211091724.
I purchased these a few months ago thinking that the new outer tie rods I had just installed were the cause of an alignment issue, but it turned out to not be the case-so these are still brand new in the box. I purchased them from BMA Parts at a cost of around $100 plus shipping.
$75 shipped for the pair, UPS Ground in the U.S. only.