rear knuckle bushing question

[nnobody825]

I am going to replace the rear knuckle for a ride quality... But too expensive ..
So I am going to replace only the rear knuckle bushings.

1 rear knuckle -> 4 bushings

I can not buy only bushings on Ford parts websites.
Where can I buy the bushing?

And please give me some advice.

 

[SHOdded]

I see possibly two candidates, but no idea if they will fit or not

• 
  
  
  8A8Z-5A638-C
  Bush

• Location: Upper
  Production Date: 06/2009-09/2010
  Require Quantity: 2
  Package Quantity: 1
  Base Number: 5A638B
  Callout Name: 5A638B
  $41.07
  $28.83
• 
  
  
  BB5Z-5A638-A
  Bush

• Location: Upper
  Production Date: 09/2010-07/2011
  Require Quantity: 2
  Package Quantity: 1
  Callout Name: 5A638B
  Replaced by: CB5Z-5A638-A