I'm not sure exactly what cost would be. You can find the parts at parts.mopar.com
It looks like it would probably run you almost $200 for all the parts, then installation if you wanted to pay for it. If you do a search on here I know there is a discussion about the upper glove box. There are people that have pulled the parts out of wrecked Big Horns and SLTs at wrecking yards. That would be your cheapest option for sure.
You could also check ebay for the parts. Every now and then you might find a seller on ebay that has pulled the parts out of a wrecked SLT or can pull the parts out of one for you and sell them to you