1996 Chevy Astro LEAKING POWER STEERING FLUID

I FOUND THE LEAK, BUT I AM NOT SURE OF WHAT THE PART IS CALLED THAT IT IS LEAKING FROM. THE POWER STEERING IS LEAKING FROM UNDER THE FRONT JUST BELOW THE RADIATOR. IT IS A METAL TUBE THAT IS LONG NARROW "U" SHAPE. IT HAS TWO PRESSURE HOSES CONNECTER TO IT. THEY GO TOWARD THE STERING COLUME AND BACK TO THE CYLENDER UNDER THE VAN. IT LEAKS FROM THE METAL TUBE UNDER THE RADIATOR. THE TUBE IA RUSTED AND NEES TO BE REPLACE. I NEED TO REPLACE IT BUT DON NOT KNOW WHAT THE PART IS CALLED.
PLEASE GET BACK TO ME ASAP AS I HAVE TO DRIVE HOURS TO VIRGINIA TO MY SONS WEDDING THIS WEEKEND.

THANK YOU
ROB JOHNSON
IN PENNSYLVIANNIA