I (think?) I remember pchansen (
http://v12uberalles.com ) rebuilt his and documented it with a DIY. I've also seen DIY articles in a few mags like "The Star". That mag also has a 1/2 dozen ads for those that do rebuilds.
Also try
http://www.benz-store.com/index.htm
If none of the above works, let me know and I'll dig up something else