The Stovebolt Site Forums The Shop Area The Electrical Bay LED parking lights ’46 Chevy

The largest selection of LED lighting for vehicles is probably ar Superbrightleds.
https://www.superbrightleds.com/search/led-vehicle-replacement-bulbs/6v/

These are later bulbs (for bulb codes), but do any of your bulbs match any of these bulbs?

Signal flashers for LEDs are available (6v LED flashers are rarer - maybe someone will post helpful information of a successful first-hand experience?)
Here is one example: https://www.amazon.com/Flasher-Negative-Vehicles-Memotronics-ELF33-6/dp/B06XSLDP53