Blue NE-2 120-Volt Neon with Pigtail leads
We can get 2503 units in Australia from Jaycar. If you order today, we can dispatch this stock between Jun 16, 2021 - Jun 21, 2021.
Needs 270kohm resistor in series for 240V operation.
Simple circuits with Neon NE2: http://www.bristolwatch.com/ele/neon.htm
Different colours also available: