Can the glass on a tube be repaired???


I dropped a rare NOS tube and the top of the glass broke off. Everything else seems fine. Can the tube be repaired and if so, who does the repair work?

Thank you.
bigkidz
Maybe if it's rare enough might be worth searching for this guy:

http://news.cnet.com/8301-13645_3-9843011-47.html

What GMC and Narrod posted is correct, the tube is destroyed unless the glass can be remade and vacuum restored. Unless the tube is so rare it merits that I would keep it as a conversation piece or throw it away.