Generic O2 sensors for ML 3.5 V6

[Bodgy]

Can someone help me with finding cheaper O2 sensors for the V6?

"Oxygen sensor2 (front)" is that one giving me grief according to my Launch CRP129X scan tool. Was hard to pin down because it works intermittently but seems to go to sleep on a longer drive and read a constant output of .2V

The recommended replacements are way too expensive to put on a $5k car but I'm handy with a crimping tool or soldering iron. Can anyone please link me a generic replacement from eBay or Repco that will work? Kid at repco was no help and only wanted to sell me the $400 replacement in the parts list.

https://www.repco.com.au/en/parts-servi ... p/A9717469

That one for example is available at a nearby repco on clearance for $10 but I'm not sure it is the right thread etc. It is 4 wire though. Do they all give outputs compatible with the Mitsubishi ecu in the correct voltage range?

https://www.repco.com.au/en/parts-servi ... is_vehicle

This one is the correct part, but it looks the same as the $10 one other than the plug being different?

Cheers.