constant current smps with pfc

hi everyone,

I am asked to develop a multi channell constant current universal input(85-260 VAC) with PFC and each channell need to be monitored by mcu and user selectable  for 350mA,500mA,750mA.

now the question is i already prepare the PFC and input section but undecided about the constant current section.

i may use transformer for multi output and feedback for the switcher but each channel current supervised and corrected

is there any suitable products that can be help me to design the constant current output section and feedback to swithcher?

what is your advice for this project?

thanks