Yes, in fact Belden made Kirby cords for many years, starting with the Model 505 which had a black rubber cord. Belden made cords for Kirby until at least the Classic III. Not being very knowledgeable about Kirbys after that, I don't know who made the cords for their later models.
Belden also made cords for Electrolux starting with the XXX and continuing up through the early turquoise G in the automatic models and the L in the budget models as well as the B7 and B8 floor/rug machines.
Belden also made cords for Royal, Electro-Hygiene, Filtex, Singer, Apex, Cadillac (vacuums, that is!), Hamilton Beach, G.E./Premier, Fairfax, Modern Hygiene, Regina, Rex-Air, Universal, Westinghouse, and many others, I'm sure.
And many other small appliances as well, Sunbeam mixers, etc.
Not to mention office machines.......!
These did not always have the standard Belden plugs; many times they had custom plugs with or without logos.
Here's an early -- and very UN-P.C. -- Belden ad.
