PS - The EF-11 filter I got from here also fits. Box has a Sear's part number 20-52730. When I ordered I also got the following info for the part:
Kenmore KC38KEEJZ000 Vacuum Exhaust Filter 20-52730, EF-11, EF11, 591016107
I searched for this online and found it is also known as filter EF-9 on Amazon. Also found another site showing Kenmore 53296 HEPA Media Vacuum Exhaust Filter, EF-9 with a picture that looks like the filter you show. No guarantee that is correct info.