Hello Michel,
Only the processors and the printed circuits are available for every modules.
See the on line shop:
www.catrain.org/component/option,com_vir.../Itemid,17/vmcchk,1/
Other components can easily be bought from several suppliers (Farnell, Conrad, Selectronic, or others).
The module schematic diagrams are included into the CATrain pack (Modules.pdf).
François also proposes ready build modules.
Have a look on the forum message:
www.catrain.org/content/view/23/4/lang,en/
Joël