Well.. i paid some 5+ years ago from him $650 , he supplied all stainless 2.5" piping, made brackets for my cooler, made all pipes, supplied hoses and bolt clamps. and it was a mint job.
the only other person i would recommend is Darren of Trikfab, he is dandenong way and he is a gun welder aswell. Only two places i would trust to weld alloy.