I have since done another, more careful search, and I will share what I have found:
|LED Vintage Filament Bulb, ST19 Edison Style, 4W to Replace 40W Incandescent Bulb, Super Warm White. I love this one, but tragically it is longer than our light fixture shades.
|LED Filament Bulb,VCE® LED Edison Bulb 4W to Replace Incandescent 40W Bulb,Soft White 2700K-6 PACK
|Leadleds E27 LED Filament Light Bulb Lamp Nostalgic Edison Style E27 4W to Replace 40W Incandescent Bulb Soft White 360° Beam Angle