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Did you ever find the actual name or part no. For the "valve-like thing"?
Indeed! I ended up getting the original Mopar unit (Part #5011241AA) for about $60. In hindsight, I probably would have been fine getting an aftermarket unit for about $16, like this one (https://www.ebay.com/itm/31540527081...vius7phcsHiEC4). But live and learn.
Let me know if you're having trouble tracking these down.