RE: compact spare
Before you do that, you might want to see if your dealer will pull a spare tire-and-wheel assembly out of a Charger for you.
When I got my compact spare, the dealer had such a hard time getting the tire that he ended up taking a spare tire-and-wheel assembly out of a Charger and putting it in my Challenger. Apparently, Chrysler designed the wheel long before they bothered ordering tires for it, so the tires are in very limited supply. (I'm guessing that while the outer diameter of the spare tires are the same, there must be some difference between the Challenger spare's wheel and that for the Charger.)
Or maybe you could go on eBay and see if you can get a Charger's tire-and-wheel assembly there. Several people on this board have done that.