Yeah SuperDave, at least you'll know next time and I buy about half my Jeep parts through Amazon since I have a prime account with fast free 2-day shipping. Only a few months ago did I realize they sell so many Mopar OE parts. Usually through a 3rd party where shipping takes a little longer but seems like the vendors lower their prices some to be able to do more business through Amazon. So every time I need a Mopar part I'll enter the part number in my Amazon search to see if they carry it. Not always the lowest price and I'll still shop around.
BTW, I shop almost totally online for everything. I use Firefox as a browser since Internet Explorer is just too slow with too many ads. Suggest downloading adblockplus if you don't want to see any unwanted ads and it works with FF, IE, Chrome, Android & Opera. The link below is for FF but you can click on the other browsers on the right to open/download it or it might just open to the browser you're using.
And about everything I buy online I comparison shop. PriceBlink.com is a great download where when you bring up an item it will list other lower prices in a narrow box at the top of your page. Then you can also compare prices elsewhere. Only problem is that shipping costs are often not taken into account and it doesn't show all online websites. But I use it a lot for Jeep parts, electronics, tools, etc, and have found some real good deals. If you don't want to see it you can just click the "x" at the right top of the page/box or temporarily disable it through tools. It works with Firefox, Chrome, Safari & iPad but not IE. While the below link shows mainly regular stores it does work for Jeep/auto parts.
Sorry for going off topic but just thought I'd pass this along.
Hope your rad plug fixes your problem Dave and let us know..