Dongan Transformer 85-M025 Single-Phase Buck Boost Transformer, 0.5 kVA, Type M, 120 x 240V Primary Volts, 12/24V Secondary Volts, 60 Hz: Amazon.com: Industrial & Scientific
Amazon.com: GE Industrial 9T51B0130 1 Phase Copper Type QB Buck-Boost Transformer 120/240 Volt Primary 16/32 Volt Secondary 1 KVA : Industrial & Scientific