I have a 68 mustang that my father just gave to me and one of many problems with it is the driver side door.  It won't open from the outside or inside.  I took off the door panel and took a peak inside.  Once I reached in I was able to open the door by releasing the latch.  I can also see that the latch is not connected to the handle.  Should I replace the latch or is there another part that I should be looking for?  

There should be a rod that connects the handle to the latch.  These are kept connected by a couple of clips that attach to the rod.  

Check a couple vendor catalogs, they should have the correct parts available.  

do you have any specific vendors in mind?  I've been look online and in catalogs but mostly what I finde are just latches locks but nothing for the rods.  

look in NPD pg 201. (set of 3 new rods- PN 21853-3a $29.95)