Flexible Heater Lines

Is there any flexible tubing and fittings on the market for heater lines rather than rubber hose, ss braided hose, etc.

 

they have these at the plumbing store



not real flexible though

 

there is mr gasket gflex hose

i think the g stands for ghey tho.

 

Might try these guys...
http://www.goodvibesracing.com/Braided_Stainless_Steel_Hose.htm

 

COOLFLEX out of Wallingford Ct. Carries stuff like that.