What fits 73-76 A body disc brake backing plate ?

I found that my dust shields for my Disc brakes are a little to ratty for my Cuda , Im installing 73-76 disk brakes & K member in it .
I found these
http://cgi.ebay.com/ebaymotors/ws/e...0645732337&ssPageName=ADME:X:eRTM:MOTORS:1123

Will these fit a 73-76 A body car , If not where could I find a nice pair thats not terribly expensive ?
Thanks
Donnie