Scanning equipment for 4 by 5 negatives

[acharpen]

This is a double post but I am in desperate need of some advice. I am an academic researcher in need of scanning to create digital images of old 4 by 5 negatives. I seem to have hit a wall and can't find any information. I'm hoping someone here will have some experience to help me find what I need. Any advice would be appreciated. I've tried to contact my university archivist but they are either out or unwilling to assist. Thanks for any help!