And the only difference between the G36E and the G36C is about 25cm shorther of barrel and stock? Surely you jest when you make such a request. You shot 300 rounds from the full-size variant without any issues and you need a manual for the compact carbine version? Were I in your shoes, I would feel the whole ordeal to be a tad humiliating, would you not agree?
Summary of G36C operations: G36E (P, V, Z, R, whatever, full size) operations, except it's lighter, shorter, and restricted.
Only difference in parts is barrel, piston, op-rod, and stock. Cheek rest is an optional piece. Take down and cleaning is exactly the same.
Replacement parts specific to G36C:
Op-rod and piston can be cut down from Sl8 op-rod and piston. Barrel can easily be manufactured from Sl8 barrel to same specifications.