Eclipse P9: Neos rear derailleur replacement

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Hi,

i have a little problem with my Eclipse P9 24":  my Neos derailleur is a bit noisy and need a registration almost every day.

I want replace the Neos with any  normal derailleur of another brand.

There is a speed conversion hanger like a Dahon 20"  for my bike?
 

Thanks and best regards.