94 Cadillac Deville 4 wire heated O2 sensors?

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Every parts store i've gone to, either tries to sell me a universal heated 02 sensor which i have to cut and splice the wires, or a two wire non heated o2 sensor for the vehicle that will not connect to the existing wire harness because the existing has a flat 4 pin connector. This car only has two O2 sensors, one on each bank, before the catalyst. Is there another vehicle I should be asking to buy an O2 sensor form that will fit this Cadillac?
 
either go to the dealer to get the right one,
get a soldering iron and splice

DO NOT get the two wire ones, they are for OBD-I cars. You cad has a very early version of OBD-II
 
O2 sensors are a pretty precise part of the exhaust system. I am not sure if it would cross reference with anything else. I would suggest however, if your having problems with parts stores, going to a dealer. It might be a little pricier (not like they are cheap anyway), but you will get exactly what you need.
 
third party replacement should work fine, just make sure that you use the 4-wire, 2 wires are signal 2nd 2 wires are the pre heater.
 
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