Hey Becky, sorry to hear your mom is taking things hard. I guess that's pretty normal. Probably will take a good while.
As far as parts prices. One of the best online catalogs is:
http://www.lmctruck.com/icatalog/cb/t.aspx
They can send you a free paper catalog too. But, until then, use their web catalog. My experience has been that most used parts are about 50% of new. I'm posting this on the forum. Hopefully anyone with any other ideas can jump in.
I put a ad on Craigslist Knoxville and Craigslist Nashville. Keep your fingers crossed.
Bill