http://www.aluminiumwarehouse.co.uk/Aluminium-Round_Tube/c120_131/p3116/Aluminium_Round_Tube_%286082T6%29_1%3Csmall%3E%3Csup%3E1%3C/sup%3E/%3Csub%3E4%3C/sub%3E%3C/small%3E_in_x_14_swg/product_info.html

£ 5.85 for a 2.5m length, cheap enough and I'm sure you will have the same in the States, probably as usual, what we pay in £'s you pay in $'s