So, is part 39 the entire thing or do I need part 6, 39, 7,12, & 48 ? I assume I need two

I think you'd need all five parts, times two.
(If ordering from HDL, ask if you get a key or two, I don't see any in the schematic)(and ask for the same key for both latches)(though you may choose to go to a lock and key outfit and get them re-keyed to your existing ignition key anyway)
You could try Pinwall Cycle for used parts, but wonder if they'd have them separate from bags.