My two 70-series trucks each have headlights patterned for Japan/UK. They are H4 units with replaceable bulbs. On my '93, it is the rectangular units--one on each side. On my '88, it is the round units. Anybody have an idea where I can source proper replacements? FWIW, I have already tried to install sealed-beam rectangulars in the '93; however, they are not a proper fit. I think I need a Euro-spec H4 for a LHD vehicle. Comments, anyone?