https://www.amazon.com/gp/product/B07QK43L8B/ref=ppx_yo_dt_b_search_asin_ti...
PUREBURG Replacement HEPA Filter Kit Compatible with Honeywell 24000 50250-S
This was supposed to fit my ancient honeywell, but my old honeywell turned out to be so obsolete that they no longer make filters to fit it.
Comes with two pre filters. In picture one pre-filter is on and one is in a bag.