In Need of 3" OD Tempered Glass Tube

does anyone know were i can a piece of 10-12"L X 3" OD X 1/4" wall thickness at a fairly affordable price (less then $50)? if that exists... my project is a fluid bed sample coffee roaster that needs a see though roast chamber with an open top to load/unload beans and for chaff to escape. temps are no more then 500F.