I did a little more legwork, and here's a couple part numbers. You'll need to measure your old one for the correct backspacing.
CLL-745704425 Wheel, 74 Star, 15"x7", 4x4.25-4.5" Bolt Circle, 4" Backspace, Each
$165.50
CLL-745705425 Wheel, Series 74, 15 in. x7 in., 4x4.25-4.5 in. Bolt Circle, 4 in. Backspace, Each
$165.50
These are both from Summit racing, the second one actually has 4.5" BS, even though their description says 4". Check when you order just to be sure.
EDIT: You should probably call Centerline to verify the centercap issue, and I also notice looking closely at the pictures that the valve stem may be a little different. Something else to look into.