Shark don't sell parts, but you may be able to fashion something out of foam. Alternatively, an aftermarket manufacturer may make them; can you attach a photo of the filters?

Hi @sue_59 · It's a bit hard unless they actually state the specifications of the filter or the filter grade. · Here's a link to one supplier where they state that it is a HEPA filter and that it retains 99.95% of dust and allergens down to 0.3 micron size which according to this is the requirement for a medical grade HEPA H13 filter. · Searching online it seems that most of the different filters that are made by the manufacturer mentioned in the first link above and are advertised as HEPA seem to meet the H13 standard. · The supplier link was only to show what to look for what is stated about the filter if it doesn't mention the actual HEPA filter grade