led headlights

Does anyone have recommendations on LED replacements for 1996 sealed beam headlights? They are 4 x 6 rectangular sealed beams and there seems to be a lot of 5 x 7 ones but not too many of the 4 x 6. I have an LS 4 x 4 Sportside p/u with a 4.3L Vortec engine that I bought new and am trying to...