Event: Unit - A unit is unloaded from a transport

Does this exist? I can see "a unit is loaded into a transport", and that works fine, but there doesn't seem to be any unloaded equivalent.

I've also tried:

Event: Unit - A unit loaded into a transport
Condition: (Triggering Unit) equal to No unit

and

Event: Unit - A unit enters (Playable Map Area)
Condition: (Triggering Unit) equal to UnitInTransport

as workarounds, where UnitInTransport is a unit variable set to the unit that is loaded in in a previous trigger, but neither seem to work.

Any ideas? Thanks in advance!

If you download WEU or i believe that they have added this.
It's availaible at http://umswe.wc3campaigns.com/weu

Unit is issued order targeting a unit
Issued order equal to "unload"

Transport = Triggering unit or Ordered unit
Unit being unloaded = Target of issued order