Backdraft uses A.J.L. latches but show out stock for the R-side
Backdraft Parts - Door Latch
PN 9301/001 LEFT and 9301/002 RIGHT
Made by (see page d29)
http://www.albert-jagger.co.uk/downl..._D_section.pdf
They maybe your fastest bet on those since they are (Backdraft is) SA built and can source easier possilbly thru this SA vendor.
Cab Door Locks - McNaughtans
But snake doctor shows stock on the OEM spec set $110.
Snake Doctor - AC/Shelby Cobra Parts - Body Hardware