I need a power supply for a Heathkit MR-1 or the parts to build one, chassis, transformer, etc. The spec's are 6.3 volts @ 3.3 amps or 12.6 volts @ 1.65 Amps; 250-300 VDC @ 125 MA. Please quote total cost including shipping to zip 93065. Thank you. Ed K6UUZ