Here's a previous thread on scanners. The key is getting one with a CCD element.
http://www.net54baseball.com/showthread.php?p=1572687
Many members, including me use the Canoscan 9000f mark ii but it is over $150. The one Luke mentions in the thread above is the Epson v33 and can be found used on ebay. Here is one:
http://www.ebay.com/itm/Epson-Perfec...8AAOSwZQRYhTuv