alternatively you could try find an authorized ctx repair ctr and they could order the part for you. last resort would be to find someone selling the same crt dirt cheap (thru ebay, web sites,etc) and buying it outright.
frankly, the price of displays being so cheap (both crt & lCD) nowadays, you might want to consider a new monitor altogether if the two forementioned options turn out to be more expensive than you bargained for.