I recently removed the AC unit from my Malibu. I am needing a heater core cover and don't know where to find one. Can you guys could point me in the right direction?

Check this out: http://americangraffiti.biz/

Is this what your looking for? On Ebay
http://cgi.ebay.com/ebaymotors/1968-1972-Chevelle-El-Camino-Non-A-C-Heater-Box_W0QQcmdZViewItemQQcategoryZ33548QQitemZ8010168 075QQrdZ1QQsspagenameZWDVW

That's not the same thing as American Graffiti sells. The ebay piece is for a car that never had a/c and it won't fit a car with air, the heater core outlets are in a different location.