There are several €śNE-x€ť neon bulbs of varying voltage and base (or wire leads).
I just changed an NE-2 bulb in a B&K Precision 1601 Regulated DC Supply.
The €śoperating life€ť of Neon bulbs is usually ~ 20,000 hours, so after about 10-15 years of continuous operation,
the bulb will either flicker or €śgo dark€ť.
Illuminated Rocker switches (Carling Curvette LRA 211 or 911) are used in power strips,
Astron DC power supplies, and WTCPN or WTCP series soldering bases.
Mouser stocks popular models, at less than $2.00
https://www.mouser.com/Carling-Techn...Zcbt5jZ1ywu5hg
Digi-Key stocks most popular LRA.
https://www.digikey.com/products/en?dc=20389
Since this illuminated rocker switch conforms to the standard appliance rectangular cutout,
a number of other switch mfg. (Cherry, NKK, C&K, Eaton) offer equivakents.