Bram Stoker

Knew it would happen someday---I cracked the glass dome on my vaporizer and can't seem to find a suitable, heat-resistant replacement that is the right size (3 1/2 inches at flange and with a tight seal)...I've tried electric supply stores (looking for a glass globe one might also use over a lightbulb) and online scientific outlets (ie lab supplies) without luck ...I'm reluctant because of time/money to send away to the manufacurer (I'm in US; company is in Australia)for a replacement and am wondering what others have done in this situation (doubt I'm the first stoner to have done this).