In the future, if you can't find a part, try looking on Rebrickable. They have an excellent LDraw number cross reference. For example here's 78c13:
https://rebrickable.com/parts/78c13/hose...7mm-d-13l/
If you look, the LDraw number is listed as 71945.
https://rebrickable.com/parts/78c13/hose...7mm-d-13l/
If you look, the LDraw number is listed as 71945.