Since the 60x VCV vent fitting elbow is NLA and the dealer replacement is a straight fitting, I checked a number of auto parts stores for a replacement.
I found this little item Dorman VACU-TITE! 47411 9/64" x 5/32" / 3,57 mm x 3,96 mm soft vacuum connector.

The end that goes into the VCV is a little more than 8 mm where the original fitting is a shade under 7 mm.
It took some poking with a small screwdriver to get it in place but it's on and difficult to tell from original.
The problem I have with it is I can't push the vent line as far into the elbow as I'd like, but it holds.

$2.29 at O'Reilly? It was $1.49 at Pep Boys.

Sixto
87 300D

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Mine has been broken and the vacuum line as been dangling for a while. Are there any ill affects of this not being plugged in? Last I checked there was not.

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1987 300TDT - 195,000 (Original #14 head)
1993 190E 2.3 - 105,000
1981 300D - 250,000

It's there to keep soot from getting in the vacuum system and clogging things.