door latch, need quick fix

[a2tripp]

So I get in the truck shut the door and the door wont latch, open the door and the spring for the latch falls out, now my door won't shut.

So the bolt and screws holding the latch on are getting their treatment of kroil before I take it apart. Aside from buying a new latch and waiting 2 weeks for delivery can I put the spring back in? The search tells me I need a new latch but......

Also does anyone have a diagram of the latch?

many thanks