What's about using an already established numbering system, ...
... allowing tracks from 1 to 99 for each data volume from 1 to 99:
vvtt
0101
0102
..
0198
0199
0201
0202
..
0298
0299
... and so on ... until ...
9991
9992
..
9998
9999
DD.20140731.1458.CEST
See also ... http://id3.org/id3v2.4.0-frames
Be aware of the Windows Explorer bug regarding the case of track number looks like an Octal Number.
DD.20140824.1106.CEST