A lot of the little hoses on and around the intake manifold are crumbling to bits. The latest appears to be for the evaporative emission purge solenoid valve. It is a right angle hose that has a 3/8" i.d. on one end (goes to the throttle body) and a 1/4" i.d on the other end.
It dosn't look like this is available. It is not listen through Naley.