Thanks guys. Yeah, it seems that 6061 is more of an American thing while 6082 is more European. I know Aalco do it but I only need 600 x 600mm. I've just found a company online, Materials4me, that supplies it in small sizes. All of the others that supply in small sizes only do 1050.Aalco will definitely be able to get 6061 for you, but it is not cheap!