Now you see, that has not been my experience with vacuum cleaner bits. The problem is, and this is universal, that if you were to make a whole unit with spares a kettle would cost the best part of 200 quid and a vacuum probably as much as a Meale or Dysan. grin. In the end to get over the broken plastic spring on the back filter I used two self tapping screws instead, having first checked the clearance and that they would go nowhere near any electrical parts of course. With Kettles though, often the makers name is just a badge. Kettles cannot be repaired and are considered expendable, just like Toasters, where I'll never buy another Tefal as they kept on breaking or bits fell off like knobs.
Brian