Window help!!??

I noticed over the last few years the decline of the drivers side window operation, so i decided to take the door panels off this evening to see what the problem was ...well much to my surprise the entire cranking/roll up system in the drivers side door is shot ...bent , broken and so on ... I need to find new parts for this. I have no idea where to start looking. Its a 1972 Dodge Demon ..If anyoen can point me in the right direction Id be very grateful.

Thanks,
Dan