Bom during configuration

Dear all,

i need to have the bom result data into variant function abap , is there any fm or exit in order to have the following information?

Example:

FG A

Char 1 = A

FG (Configurable)

     SG

          Component 1 = $self.char 1 = 'A'

          Component 2 = $self.char 1 = 'B'.

My requirement to have the bom result in the abap function (CU66 , CU01 already created).

Thanks a lot

Daniele