superbrightleds

BULB MINI LAMP FESTOON 211-2 ANCOR 639 522112 REPLACEMENT BULBS 2PAC BOAT PARTS | eBay
These folks will ship to EU
Ancor is a brand focused on boating.

Must be some available even closer.
@slantsixdan used to be involved in some collecting and selling of older lamps and may know some EU venders