MB51 - Add a field in output list

We changed the layout of MB51 to add, in the output screen (ALV list), the fields: MSEG-ANLN1 (main asset number), MSEG-ANLN2 (asset subnumber).

The customer also wants to have the field ANLA-MCOA1 (asset description).

How do we add? Maybe there are a BADI or UserExit for customize the program RM07DOCS. Perhaps it is better to write a custom program Z_RM07DOCS (changing the standard program), or change the view V_MMIM_REP_CUST, adding the missing field.

Please help: which path to take and how?

Serena