If there's some money left to spend you might want to consider the buying a licence for the software "VueScan".
It has been mentioned before in this forum e.g.
At work I have an old canoscan lide scanner. The only way to get it to work thesedays is with VueScan (windoze version).
VueScan software has a solid reputation, it may be worth taking a look at, if there's still some money left in the budget.
