I created this 5.25" clean floppy spare set for sale here in my ebay shop:
To work it needs its clean 5.25" floppy container which can be purchased in the link above.
There are only 5 spare parts for 5.25" floppy cleans on sale.
The product was personally created with high quality materials. The head cleaning fabric is a softer scale than the one in use a few years ago; in this way the head itself is preserved.
To use the product, refer to the description of the complete 5.25" clean floppy that you find in the link above.