Sorry, the XSH88 is no longer in available.
I have also needed replacements for the XSH88, and I was able to obtain them years ago. Recently, however, they seem to have gone the way of the dinosaurs. Even though the filter above looks similar, the difference seems to come down to the shape of the base (e.g., with or without a lip, etc), and whether it will properly fit into the vacuum. Without buying it to test out, I don't know what else to suggest. When I use up the last of my filters, I'm planning to buy a new vacuum....
I HAVE ONE, NEW IN BOX, IT WILL BE LISTED TONIGHT ON EBAY, DON'T HAVE THE ITEM NUMBER SINCE IT IS NOT YET POSTED BUT CAN BE FOUND SEARCHING SHARK XSH88 OR ITEMS BY SELLER CLKORANGE.
THANKS, MARK