Question about Philips 7000 series FC9741/19

Where can I find a suitable HEPA filter? This one, see link, doesn't seem to fit and I haven't found anything at Philips directly. https://www.galaxus.ch/de/s2/product/philips-fc803801abluftfilter-hepa-13-1-teilig-staubsauger-reiniger-zubehoer-234025