You are only going to find them used for that price. Factory Reproductions makes them, I think the 20s run around 200 each and 22s 250 each. I have seen your car on some of the Facebook groups to. Put up a WTB ad in the for sale section and you may get a hit. Good Luck.
For what it's worth last week I ordered (4) 20x9 Viper Replicas in a chrome finish along with (4)
HANKOOK Ventus V12 Evo
245/40ZR20, Tire pressure sensors installed, a set of chrome gorilla locking lug nuts. The tires will be shipped already mounted and balanced on thw rims. The total including shipping via FedEx to my front door was $1,838.00
That is the best price I could find where I got a nice set of tires and not just some crummy ones along with TPMS sensors and shipping. Everywhere else I looked it was right at 2k or above.
If you'd like I can pm you the site I ordered thwm from. I'd post it but I'm not certain if that would be frowned upon or not?
If you're lucky or patient you should be able to find some SRT8 take offs on the various Charger/Challenger forums for $800, I had to drive a whole day to meet up with a Challenger forum member to get mine, but the drive was fun so it was worth it.
The OEM forged ones are lighter and worth the money if you care about performance. I had them as summer wheels and kept the original 18's for winter, and they weight just about identical.
I honestly spent too much time polishing them Chally wheels just for how awesome the Alcoa & SRT letters look