This dilemma seems to fall within the domain of registration. This forum is the most broadly available and public face of our group but it is not the most active. For rapid response to a specific question like this you probably want to go to a listserve and get your inquiry directly into the inboxes of the folks who know. PACCIN has always had a large number of Registrars and Collections Managers as key participants and supporters. You can join our ListServe by find the tab with that name at the top of the articles page. This will put you in touch with both registrars and commercial Art Services professionals some of whom deal with these issues daily. Another source to try if you want a virtually guaranteed response is the RCAAM list (you may still need to be a of AAM to join this one though) a newer organization that also has a forum is ARCS (Association of Registrars and Collections Specialists). All of these organizations and their links can be found on the resources page of this site. http://www.paccin.org/content.php?140-Resources
Good Luck
Ashley