68 Camaro - Need some advice/help

[Gr8t68]

Just got the rear qtr off on the driver side and found some damage (see the pics) to one of the panels behind the qtr from a previous engagement with a LTD wagon in the mid 80s. The question is, does anyone know where I can get a new one or what the proper name for this part is? Also, I need to locate a part that welds to the inner tub and connects to the trunk hinge. Is there an aftermarket piece availabe for this or will I have to fabricate one? As always, your comments are appreciated.