If anyone else is annoyed at the crazy prices for the WPT-404 kit for what is essentially a plug and some pins, you can buy the pieces separately from mouser.
The connector is a Yazaki 7283644540
Mouser Link
The pins are p/n 7116411102, you'll need at least 2 for the connector...
Is the gel sticker necessary for the sensor, or can I just install it bare? I got a used sensor off of eBay and it didn’t come with the gel sticker, so not sure if I’m missing something or if it doesn’t need it to work.