[urq] Known good brake servo or source for rebuild kit(s)?

[racingiron at comcast.net]

> There's another page on the web about the brake servo wich also 
> lists the parts for the early cast iron servo .
> It has a couple of pictures of a beautiful shiny black painted cast 
> servo . I seem to have lost that link , but maybe someone on this 
> list has it bookmarked ?

Maybe you're thinking of a picture I made of a disassembled iron booster?
http://home.comcast.net/~racingiron/layout.jpg
Only one of the o-rings is different from the aluminum booster, but I don't know which one or what the size is.  Sport Wheels in CO used to offer kits for both types.  Maybe they still do, or they will reveal the dimensions of the special iron o-ring?  Here is a post I made about the differences between the two types:
http://www.audifans.com/pipermail/urq/2008-June/013470.html

Biggest pitfall in the process is getting the old seal out of the plastic end cap (if AL booster).  The plastic is brittle and breaks easily.  The instructions linked on Phil Payne's site have a few tips on that.

Eric R.
'86 urq
'92 urS
'93 urS