B18C/R into 00LS Teg, engine harness wont fit ECU

98 JDM b18C/R Swap went fine, ECU sent wont fit with 00 LS Integra chassis. ECU will fit up with 2 plugs, third comes close to fitting in spot with no prongs, spot WITH prongs is not close to fitting harness bit. Is there a place that will sell a piece to fit inbetween the harness and the ecu to make it fit up? I'd prefer not to modify the harness if possible.