I have a metal trunk emblem "500 SE" that can be modified to read "500 E" if you're skilled with a Dremel tool. Since this is a W126 part, it's made of metal (not plastic, like the W124 emblems) so you'll also need to remove the mounting pins and provide your own adhesive. I find that 3M VHB works well on emblems and doesn't hurt the paint if you choose to debadge in the future.
According to the MB Classic Parts search: https://partssearch.mercedes-benz-cl...5?tt=automatic
"This part is no longer available through the Mercedes-Benz sales network and will not be remanufactured by Mercedes-Benz Classic in future."
$60 shipped in the USA.