If there are only 1 or 2 of them that can then I know both of them. I think most extruders can anneal to the right grades. Aluminium is pretty soft without any heat treatment after extrusion. Any serious application of aluminium requires T5 or T6 annealing.
I know 6005-T5 was succesfully handled by a Chinese extruder (albeit with a minimum of 2 mm wallthickness)
