Foam filter is not available on its on. You will have to buy this DCF9 filter kit which has the hepa filter and the foam filter on it. https://www.ezvacuum.com/eureka-dcf9-dust-cup-filter-74482-dcf9-genuine-p-564.html
Why did you tell me that I need a hepa filter when I asked you about foam rubber filters? I have spare hepa filters. I need the foam rubber one.
You need this filter instead: https://www.ezvacuum.com/eureka-hf-7-hepa-filter-cartridge-61850b-hf7-genuine.html