Any Wilma and Betty lamp ever produced may be upgraded to the most recent technology with our latest LED boards - this is cost-efficient and protects resources.
https://www.lupine-shop.com/en/Accessoires-by-Category/Upgrade/
The first question is: Do you actually need an upgrade or is your lamp already equipped with the latest LEDs? The latest LED board with CREE XM-L2 LEDs looks golden yellow through the lens holder. If your LED board looks green or red, you may upgrade your lamp.
The only thing you need to observe is that lamps with an external switch require another upgrade than lamps with an internal switch.
Sorry this is technically not possible.