3.3 & 5 volt power supply

SALE! - Lambda Regulated +5VDC and +3.3VDC Power Supply-The Electronic Goldmine

This would be good for powering pt-54s, and 445 diodes

Note that the 7 amp rating is merely the maximum current output it can be operated at before problems occur. You still need to regulate the current somehow to make sure you don't burn out the power supply.