How about a pl tone decoder (Get the wanted repeater to send or pass through a pl tone)? Lower the link antenna? Increase the number of elements on the link antenna? Turn th link antenna more north so that the non wanted repeater is not receivable(Find the weak spot in the pattern)?
Thanks, Sean Murphy 985-951-8557 Office 985-264-2765 Cell Certified Software Solutions of Louisiana L.L.C.