is there any Rgb To Vga cable for turbo duo, genesis, snes for lcd monitors ?

[nevarna]

Hi,
i have made a scart connection for my turbo duo so its outputting video into rgb signals. what do i need to do to convert that to a vga signal to plug into lcd monitor ? i hear its almost impossible for a regular crt to convert the signal but lcd its possible to make such a cable.
Thanks