I also have a leak from what a think is the n/s washer jet ... I fitted new aftermarket jets which i wasn't overly impressed with, I've had all new seals fitted and a new front panel during my restoration, so I doubt it's coming in there ... Van's away for Upholstery right now, so i'll be finding the cause when it returns.
The pics in this thread are handy for the Vent drain tube ... mine was split when the van was stripped down so I replaced it with some 25mm flexible conduit/copex
http://forum.earlybay.com/viewtopic.php?f=2&t=71109" onclick="window.open(this.href);return false;