Door lock barrels

Where could I get new door barrel for my 90.

Its a 1990 so its not got central or anything just basic locks. Also does anyone know if you can get better ones than that of those fitted by default?

I would be willing to renew the all the doors locks for upgraded ones if it was not to expensive.

All ideas would be helpful thanks.

Hmmmm,

I think i need to renew mine too. you know its bad when you can open the drivers door with the land rover key thob!!!!!!

Craddocks and Paddocks do 'em, Land Rover Orphanage also has that kinda thing