I found this outfit
http://www.lbcarco.com/cgi-bin/gen5?...=/halogen.html a couple of years ago they have halogen bulbs that look just like the Mazda, they also understand and have bulbs that are correct if you have converted 12 volt or have modern 6 volt battery system including the need for slightly higher voltage as well as the change necessary if you have replaced the generator with an alternator.
I installed some on my trucks (6 volt generator) and they do give off more light even in the black out head light shields.