4g64 ignition module/CAS

hey guys! got a question.. does anyone know much about the ignition module for the 4g64? i had an issue a while back that involved a no spark condition, so in my testing i think i may have damaged mine. the markings on it indicate the part number is J914. my local dodge dealer as well as the local mitsu dealer both tell me they cant get it, i can probably find it online somewhere i know but in digging around at the scrap yard i found one in a 3.3 marked J915. the parts are identical on the outside, same connector, same size, etc. does anyone know if they function the same? im pretty sure all it really does is shine a light at the little reluctor wheel and generate a timing signal for the injectors. i would think all the important stuff would be based on the signal coming in to the dist from the ecu right? anyone have any input?
TIA
greg