NCH8200HV Nixie DC-DC High Voltage Boost Power Converter – Omnixie Electronics
Amazon.com: Acxico 1 Pcs Nixie Tube Power Supply Boost Module 12V to 150-220V MAX1771 for SZ3-1 QS30-1 : Electronics
Amazon.com: 170V DC High Voltage Power Supply Module Boost Converter for Vacuum Tube, Nixie Tube Clock, Magic Eye 6E2 Level Indicator 10V-24V DC Input, 90V-250V DC Output (Blue) : Electronics
HV Nixie DC-DC Switching Power Supply - Electronics-Lab.com
High Voltage Power Supply for Nixie and Valve Tubes : 6 Steps (with Pictures) - Instructables