Can't find replacement part for skimmer

[Winter-huntsman]

So my protein skimmer has a black sponge that is almost fully deteriorated from cleaning it harshly (to remove trapped algae). When I look for a replacement part I can find one. The skimmer is a reef octopus HoB 100 classic. The part I'm looking to replace is called the black sponge in the manual. If you can find the part let me know or if you know something else's I could use as a debris collector.


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