You can buy conversion headlights that will replace sealed beam with a lens / reflector housing and replaceable bulb like that on a new car. They make them for round and square headlights. Several quality light manufactures like Cibie and Hella offer these. You can use any standard H4 type bulb in the housing.
The kits run $50+ per light, but that is a one time cost for the housing, after that you are just replacing the cheaper H4 bulbs inside.
H4 style LEDs are available and draw little power compared to Halogens. The only thing that would look off would be the fact the lenses were so nice and crisp compared to the cheap lenses found on most sealed beams.
I put the Hella conversion an older car with 4 rectangular lights and it made a huge difference driving at light. I understand round is a better shape for lights than square so the 7" round should be even better than mine.
http://www.myhellalights.com/index....mps/vision-plus-7in-conversion-headlamp/
