I use
www.Superbrightleds.com. I trust their products to be the best available at the time. See what they have.
Headlights are tricky due to the different ways they focus the beam. LED bulbs have a different pattern compared to incandescent and some bulbs work better in some applications compared to others.
People have commented at my car’s easily seen brake and tail lights.
I haven’t tried LEDs on an early car headlight but I’d like to know what works.