To find a glass conservator in that particular area, contact the
American Institute for Conservation at the following address. They have
a referral service by topic and area and are good about accepting
requests on email.
American Institute for Conservation (AIC)
1717 K Street, NW Suite 301
Washington, DC 20006
(202) 452-9545; [log in to unmask]http://palimpsest.standford.edu/aic
FAIC Conservation Services Referral System
Lisa Young, archaeological Conservator