Zoso7

After replacing my fuel pump and filter on my 96' S500, I started getting some surging when cold and tripped fuel trim codes. While looking for any vacuum leaks I decided to replace my fuel pressure regulator as it was original. I noticed a small leak in the vacuum line going from the fuel pressure regulator to the intake. I did a temp repair on the line and the car runs great now. Does anyone know the p/n for this vacuum line? It's actually two lines with maybe a filter/restrictor or check valve in the middle? Before I cut lines and fabricate I wanted to see if this line has a p/n. I can't find any reference to it anywhere.