speaking of bulkheads... check fastenal.com. i just ordered some for a different project but noticed they have a DOT section for brake stuff. Lots of bulkheads there. I got brass ones for my project. Just got an email saying they are being shipped to a central warehouse from all over and then to me. bleh. slow. glad i didnt waste any money on overnight shipping.
http://www.fastenal.com/web/products...l.ex?sku=67885