door latches,whats available?

Does anyone know of aftermarket door latches that are small and positive latching? I need them for a 1954 willys truck. The inside handle is actually a push button which rotates a rod much like a flat screwdriver.I would like to retain this,and the outside handles if possible.Or perhaps there is an OEM one that I could adapt somehow?Thanks for any advice.

Thanks for the links streets.Those are exactly what I need.

For junk yard try Dodge Omni/Vw Rabbit.
Don

Thanks Don. I found a new set locally at a company that makes truck/van bodies,for $21 each including the strike bolt. They look real heavy duty compared to the stock ones. The hard part is going to be getting them to work with the stock handles. I really want to keep them, although the solenoid idea would be alot easier. I could also use a solenoid to operate the latch,and rig the handles to operate an electric switch. Has anyone gone this route? Either way it will be major surgery to install the latches, so I think I will put it off till spring. Thanks everyone.