[TYPO3-commerce] Commerce & Contracts

[ex-sys]

Hi,
how can I use commerce for Support-Contracts or Service-Contracts?
Example: Product01 = Support-Contract
                    Article01 = The contract01 with client a
                    Article02 = The contract02 with client b
                    Article03 = The contract03 with client c
                      etc.

                Product02 = Support-Contract
                    Article01 = The contract04 with client d
                    Article02 = The contract05 with client e
                    Article03 = The contract06 with client f
                      etc.

Greetings
Michael