[Drake] Drake L4-B / L-7 Power Supply info needed

[n1udi at att.net]

I would inquire about the subject two power supplies. I acquired a L-7 RF deck # 2858  to mate up with my TR7-A, is the L-4B power supply compatible to be used with the L-7 ? The L-4B power supply that I have is # 4165 on it's ID  tag. It, in ref to the L-4B P/S has not been  in service sense I bought it from it's previous owner ten years ago. I'm sure it needs  to be rebuilt at this stage  Electrolytics, diodes,ect. 

Sense Drake is no longer around were is a good place to find the components for the L-4B P/S rebuild ? Is there any thing that I should be checking on the RF-deck also ?, it came from an estate. Not sure how long it as be inactive?

Thanks in advance, Rock