Those switches were originally made by ITT Schadow many years ago and used to be available in many styles of buttons. I’ve seen failure of the indicator several times due to the delicate plastic nature of the way it is built. Never have had to replace one in the 2465 though.
Hekimian Laboratories was known to generously use this style of ITT Schadow switches in their telecommunications test sets which can be found on ePay.
Greg