Where do I find a hot box vaporizer replacement part?

I got a standard $50 hot box vaporizer from a smokeshop in Tahoe. The glass peice that hooks in broke leaving it useless. All I need is the glass peice that hooks in and I'm in business. I can't find the right selection online and they are all 20-30 dollar replacements when my vape was only $50. Where can I order this part cheap? I mean come on.... I've ordered $5 stems for bongs and stuff this shouldn't be different.