SKU: AL-508-3180, $28 for each LED, if you wish at Aero-lites
https://www.pilotlights.net/led-bulb-t10-t10-194-base-led-aviation-auto-bulb-white-10-30-volts-dc
$12.95. Check for fit (there's a compatibility chart on that web page)
There are some images of the light assembly on their web page, and the light and socket look compatible.
that appears to be a Whelen A600 light assembly. Rear bulb is part number A-508-14 for a 12 volt electrical system. Cost at Aircraft spruce is $60.00. Quick search found Interlight selling for $15.00.
Best of luck
David
ETA- watch out for you colored hemisphere glass covers, nothing is holding them on in the photo but friction!