Yes OP, they do have a vent tube - if you are standing at the back of the car looking into the boot it is on the left of the battery.
Mine had a new one in December, and I chose Exide as my BMW indy said OEM ones were Exide. I'd have expected Bosch, but the Exide was cheaper with the same warranty. :lol:
You may get an online discount at Euro Car Parts with Easter coming up - assuming you can wait!