This is topic Wanted: API VU Meters in forum Equipment and Supplies Wanted/For Sale at Film-Tech Forum ARCHIVE.
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Posted by Paul G. Thompson (Member # 655) on 09-27-2002, 07:20 PM:
They were made by the API Company. I cannot locate the company through Google Search. Rather that go through the typical Blah Blah, here is a picture. The measurements are critical. 
I need two of them. State your price. Thanks.