I need to replaace the door locking/open/close latch right front door of my 66 new yorker 4 dr HT. I could not open the door so I fooled with it best I could with a slim jim and did get it opened . I thought it just needed lubrication . Closed the door - wont open again . Before I take the seat out and remove the door panel I want to have another unit in case I need it . I am new to Chrysler and have no idea of part number , what years will work or where to go to find one . Any help would be appriciated . Thanks in advance .