OMG, You have very special needs. 
There's the script here. It can find missing tracks by the tracknumber. Of course, it cannot find missing last track(s), because it doesn't know, how much tracks should be there... But the script works, if you use xx/XX tracknumber format (e.g. 05/12).
For example, it works with an album containing track 2, 3, 4, 5, 7 (missing track 1 and 6).
Oh, and I updated the previous script (see above).
MissingTrack.mte (505 Bytes)