[V8] Front Shock Replacement parts

[S_Matus]

I was in on the GB Koni shocks and want to replace the worn components in the front shock system.
 
I have identified the BumpStop needs replacement.  Do I need to buy all of these pieces to replace it?
 
445 412 131    Shock Bump Stop  (mine is falling apart)
431 412 175 D Shock Dust boot 
431 412 389 B Cap for Boot 
 
And of course the Strut Bearing will be replaced.
441 412 249 A Strut Bearing 
 
If anyone has done this replacement please advise if all 3 parts are needed.  Are there any aftermarket Bumpstops w/ dust boots available?  If so where?
 
Scott.
'91 V8QM
'90 V8Q (Neither Auto or Manual)
'02 allroad 2.7TQM

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