I know that lately, we've gained a lot of new members which is awesome and a lot of those new members are coming from other forums that may use vBulletin and their Private Message (PM) system. Here, we use the XenForo forum software which is (IMHO) much better than vBulletin. The "Conversation" system here is the same as the PM system on vBulletin. So if you want to PM another member, just click their username in a post, and click on "Start Conversation". To see all of your PMs, click on your profile and go to Inbox. Hope this helps.
Besides checking with every Cadillac dealer (VWagons don't stay on dealer lots very long), ask if they know any one with a VWagon that might be interested in selling.
Check the auction sites, ebay, etc. - VWagons don't stay there long either.
"Bring A Trailer" might have something. When I get ready to sell my VWagon, I'm going to list it on BAT.
Go to local coffee-n-cars shows and ask around.
From what I hear, manual VWagons are pretty rare - less than 20% of production. Good luck with your search for one.