Yes - how stupid I am :C: :C: :C: - thanks for the advise !!!
Here some of the parts I use:
Bulkhead front and rear from Hardcore Racing,
Titanium braces from Hardcore Racing,
Titanium Skidplates front and rear from Hardcore Racing,
Upper and lower arms, shocktowers from
http://www.xtreme-cross-racing.com ,
Titanium turnbuckles from ... ?
and many little other parts from Traxxas, Duratrax, RPM, Jakspeed-Racing etc.
Greetings, harald-hans