I use mainly the above too, and got in the past good services as well from NPD, mustangamerica, E-bay... I tend now days to order right at the manufacturer, like Holley, TCI... if you plan a modified resto, i'd look locally for specialized shops/ateliers with CNC machines, sandblasters etc... and last but not least, invest in good tooling like a weld machine, air compressor... I regret so much I bought my welder so late, that's prolly the first thing I would buy now if I would start over.