Hi Ellen,
I would also recommend using AIC’s Find A Conservator tool if you are interested in having the maps treated by a professional conservator.
Given that the primary goal is to archive the information held in the maps rather than display them, digitization may be good alternative or additional option. There are larger regional labs that offer both conservation and digitization services. The Northeast Document Conservation Center outside of Boston comes to mind, for example. Scanning the maps ‘as-is’ to capture the information in them, and then archiving these scans may be a good option (but be sure they are in more stable digital file format like a DNG or TIFF, not a JPEG). If you are ever interested in displaying reproductions of the maps down the road, you could later pursue a “digital restoration” of the scans to reduce the appearance of any disfiguring damages. But it’s important to keep in mind that the maps will have to be unframed and possibly stabilized prior to digitization, which may require intervention by a conservator.
Rebecca