Baby Bjorn Bouncer - New covers on older versions?

[Kateblue]

Hi I'm I'm considering getting a used baby bjorn bouncer and potentially getting a new cover for it. Does anyone know if the new covers for the current models fit older versions?

Sorry if this has been asked before. On the product listing the covers mention fitting bouncer bliss and bouncer balance soft but many of the older used ones for sale don't mention what model they are.

[stuckinarutatwork]

The covers are washable. I wouldn't bother with a new one TBH. We bought a second hand one and it was good as new with a good wash. I had a sicky baby so always had a muslin cloth between their head and the fabric of the seat anyway.