I had this same problem. After doing a bunch of digging I ended up ordering a pack off of Amazon that fit. It's unfortunate to see how bad the customer service is from Shark. I hope this link helps. https://a.co/d/g1hSuJK More on reddit.com

The 2510SOUS is same as the 2501 - it's just a different color. The RV2500AE series share parts this includes: RV2500AE, RV2502AE and RV2502AECA AV2500AE, RV2500AE UR2500SR series. The AV/RV/UR/AI prefix are all the same. The xx25yy series have interchangable parts. RV2000 series is different- e.g .xx20yy series. RV2300 series is different - e.g. xx23yy series There is also a RV2800 series.. and the RV2600 series, and RV2400 series It's harder to distinguish between RV2000 series and older (so RV1000, RV100, Rv900, AV1000,.. RV900 , RV700, ) (which are all VLAM - camera based) and the RV2x00 series (2300,2400, 2500,2600,2800) - which seem to all be LIDAR based. Except some of the RV2400 series are camera based. WTF. Refer to this page - and pick the closest one.. and the parts will be compatible.e.g. brush rollers, dust bins, etc. sometimes the parts are shared across multiple families.. e.g. the RV/AV/UR/ 1000 series brush rolls work with some RV900 series and the batteries are almost all identical.. but not entirely. Lots of the filters are identical for the different generations of Auto empty docks - but the bins are totally different .. Shark need to publish some cross compatibility charts to help the end users. More on reddit.com

I don't believe they are available. Shark is kind of a budget grade vac, not that they are a bad choice but they aren't made to be serviced in this way. Level up to a Miele, Dyson, or equivalent if you want a parts catalogue. More on reddit.com

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