Track rod left adjustment screw round

And the next construction site with a part that is no longer available...
I installed a new track rod head on the left for the TÜV. Track adjustment is unfortunately not possible, as the screw of the threaded rod is completely round to adjust. With a plier you can't get it when it's loaded on the measuring level. I would also have been willing to buy a complete track rod, but it's just nowhere to get...
Does anyone have a tip or a trick? Or even better: does someone have this threaded piece lying around in good condition and would like to sell it? Then I could exchange it and finally get a straight steering wheel again...
Thank you
Basti