USALight.com offers electronic transformers in various wattages inclucing 50 Watt, 150 Watt and 300 Watt options.
Part Number: US-ET204B Wattage - 75w max. Input Voltage - 120v 60Hz Output Voltage - 11.5v 40kHz Length: 3" Height: 0.75" Width: 1.5" 2 year limited factory warranty
Part Number: ELV-60 Wattage: 50w Input Voltage: 120v 60Hz Output Voltage: 11.5v 40 Height: 0.75" (19.05mm) Length: 2.375" (60.32mm) Width: 1.125" (28.57mm) 4 year limited factory warranty
Part Number: RL12-75A Wattage - 75w Input Voltage - 120v 50/60Hz Output Voltage - 11.5vLength : 2.08"Height : 0.79" Width : 1.30"
Part Number: US-ET204 Wattage - 75w max. Input Voltage - 120v 60Hz Output Voltage - 11.5v 40kHz Length: 2.375" (60.33mm) Height: 0.75" (19.05mm) Width: 1.125" (28.58mm) 2 year limited factory warranty
Part Number: RS12-105-277 Wattage - 108w Input Voltage - 277v 50/60Hz Output Voltage - 11.5v Length : 3.03" (76.99mm)Height : 0.81" (20.57mm)Width : 1.30" (33.02mm)
Part Number: RS12-150-277 Wattage - 150w Input Voltage - 277v 50/60Hz Output Voltage - 11.5v 40kHz Length : 3.31" (84.07mm)Height : 1.00" (25.40mm)Width : 1.53" (38.86mm)