Yours is possibly already swapped out. The originals did not have a vacuum port, no second gens did. But it is a common option to swap just to limit hot heater hoses in Summer cabins. I cannot recall the original heater hose fittings done, they have a flow limiter inside them. I collected a few good used just in case, then installed the vacuum version anyway.
Edit.....thought you meant the actual heater hose of coolant. You mean the vacuum line with checkvalve that runs to the heater controls inside? Which part are you seeking?
Edit 2...no, actually it sounds like I was right the first time but also includes the second version as you have something non standard, but let us know exactly.
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