If it's plastic, it's gonna crack.
For your question on US vendors, I've searched high and low for one that had a decent price, best I found was $49 before shipping. I ordered one of these tonight: Kayfun Lite Clone RBA Rebuildable Atomizer Tank Clear and Stainless Vape Vapor | eBay It was $39.94 with both tanks, shipped, I hate to support evilbay, but what do you do?