Kenmore (Sears) BI Vacs

We have had a BI vac in each of our three last homes in Canada and the US. In Canada, Sears sells about 5 grades of Kenmore BI vacs plus some other brands (Eureka is one)
Friends just moved into a new home in Washington State which is roughed in for a vac system. I took him to Sears in WA to show him what we have but strangely enough, USA Sears don't carry ANY models of BI vacs..even Kenmore. It appears our CDN bought Kenmore is made in the US, but can't be BOUGHT in the US...strange.
Anyone know WHO makes these for Sears ? The model # on ours starts with S107 the new (one year later) model of the same one starts with 208.
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