Followups set to sci.electronics.components.

In sci.electronics.components wrote:
seek LEDs in above-styled base, for replacement of PSB-120 indicator
lamps. a vendor whose product has been assigned a NSN for ordering
through the Federal Supply System would be optimal....

Using an advanced search technique known as
http://www.google.com/search?q=t-5+telephone+slide+led ,
I found
http://www.ledtronics.com/datasheets...d_leds/67b.htm
from the first hit.

Matt Roberds