%track% use 9 but want 09

i want "xx"-binary like "09" not "9" if i used "%track%" .
this format is not helpfull: "0%track%" because "09,10,..." not "09,010,..."
searching like this: "%00track%
can anybody help?

Take $num(%track%,2) as format string.

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Just as a footnote:
MP4 files do not allow leading zeros at all.
And: 3-digit-numbers with leading zeros will be interpreted as octal values in Windows Explorer.