Good thing you called.
The 968 seem to be a better station than the 86 and 200 and that might be the reason.
I should've read the spec: PCR800 Oregon Scientific Wireless Rain Gauge for Professional Weather Station is compatible with the WMR80A, WMR90A, WMR100, WMR100N, WMR200 and WMR88A professional weather stations.
I don't see what model the 968 use. Did the person at Oregon told you?