FPSO/FSO Block coefficient & hull dimensions

As part of a student project I would need some block coefficient values for FPSO and FSO (both from converted tankers and new built barges), so I was wondering if someone had some knowledge in this field and would like to share it, or redirect me to a specific website since I was not able of finding anything online.
I am interested in the percentage of the FPSO/FSO hulls that is rectangular and I am using a model that requires length between perpendiculars, breadth, draft and block coefficient. I was able to find some dimensions of length and breadth, but most of the websites do not give actual draft, mass displacement or block coefficient values.
I would sincerely appreciate any help,
Thank you.