Catch thingy:
One of these:
http://www.ebay.co.uk/itm/VW-T2-TYPE-2-BAY-WINDOW-SLIDING-DOOR-INNER-LOCK-CATCH-ALL-YEARS-/271066733724?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3f1cd61c9c" onclick="window.open(this.href);return false;
Just putting mine back together at the moment, endless search for little parts!
Will