Here's an option for you that I used when I needed some for our 2001 DSDP. $13 Ea. plus S&H
I opted to replace all the lock assemblies with new chrome ones. That sure dressed the old girl up a little IMHO and 1 key opens them all
I did save 2 of the still working ones just in case.
John and Sue from W. Texas
2001 DSDP, 3126B Cat
"the Oilfield PAID me to retire, so I did" :-)