Look up microfilm service bureau / Digital Imaging, in your local area. These businesses have high end equipment designed for this purpose alone.
Understand that these companies service banks, Insurance Companies and other businesses, digitizing dozens or hundreds of rolls of film You are not in their league at all.
Be very nice and polite to the business owner/manager and bring some samples to their business and ASK if they can HELP you in any way. They might be willing to let one of their employees spend time on your project for a reasonable fee.
Step 4 If the price is prohibitive or if they say no. Look up another service bureau and try again.
PS the equipment is thousands of dollars and the time needed to setup for one or two microfiche is not as efficient as setting up once to run hundreds of fiche.