1995 Other Oldsmobile Models coolant leak

While driving my 1995 Olds Achieva 3.1, I was suddenly overwhelmed by the smell of antifreeze. I was on the freeway and the temp warning light did not come on. It had been running a little hot (bet. 210 and 220 deg.) And did not get above that until I got off the freeway. When I turned it off, there was steam coming out of the vents and the engine compartment. Several hours later when I was able to inspect it, all of the coolant had drained out and there were no signs of leakage on the visible hose connections. Upon adding coolant, I found it to be pouring out of a ell shaped, thin rubber hose connected to a metal nipple protruding from the lower firewall on the passenger side of the engine compartment. I'm at a loss. How do I fix it, what parts do I ask for, ?