Realised that a purpose specif module is not necessary for this specific task. Minimal adaptation of current code and a new cfg will do the trick.
New ntuple Higgs Invisible productition cfg with:
* Activated option to store references for primary vertex tracks with pT>1 GeV
* Added ICTrackProducer to store the track associated with the primary vertex with pT>1 GeV
Adding possibility to select a branch to store tracks