Hello, As far as I know, until the NATIONAL era in the early 70s, all the 1940s, 50s and 60s, the vacuums were sold in stores like SEARS so foreign brands almost 100% american brands were the common vacuums.
In a 1954 Catalog from Sears Mexico, it is listed, no image, a vacuum with no brand, I guess it is an electrolux.
Then during the NATIONAL era you can see other few but other brands, maybe from socialist countries.
And as for vacuums made in Mexico, I dont think there are mexican vacuums, maybe just the name and ensambled in Mexico but not made in Mexico.
In another big catalog store, from the year 1978, a General Electric Vacuum wa sold.
Hoover was another brand sold.
And the one that was the most famouse because of a particular TV ad, was KOBLENZ, here in youtube there is a video to the ad.