You could try using the Excel VBO, searching for the cell value of ""Staff Number"" then using that to get the cell value of the cell containing the actual number.
This would only work if the value of Staff Number is in a consistent place such as column C as you would find the wording of Staff Number in B12 so you would know to get the value in C12. If you found Staff Number in B50, then the value should be in C50 and so on.
Hopefully the attached picture will help.