Clearing out the workship spare parts department and I found these little beauties …

SUPERTEX
LR8
Input range 13.2V ~ 450V
Output range (adjustable) 1.2V ~ 438V on the condition that the input is at least 12V in excess of the required output
Low current output (typically limited to 20mA)
3 pin regulator
TO92

Regulator ID markings
SILR8
8X02
NEW Old Stock
Stored and supplied in sealed plastic packets