Wanted Wanted: Dolby 361 power cables for early 3-pin round pin connector

[pvision]

I need a couple of power cables for early Dolby 361s. These used a power plug also found on Wurlitzer 200s and some Hewlett Packard gear

The plug is oval and has three round pins in a very flat triangle shape - see image of the socket below

 

[Ike Zimbel]

I think these plugs were also used on at least one brand of vacuum cleaners. You might try searching for those as well.