1998-1999 are the same.
I looked up the switch pin outs and they are the same color wires to same source pins (well at least on the 1999-2001 Ram) to the durango. There is one difference tho;
On the left side of the harness is pin out #1. This wire is supplied with a 20-VT/BK colored wire. The wire goes into the switch as "Back-Up Lamp Feed". On the 1999-2001 Ram it states L10 18BR/LG goes to "Fused Ignition Switch Output (Run)"
Now I would say its worth a try from a junk yard but I would try to find the correct harness.