It seems the going price for the rad is $702 to $758 and PIM sells their fan kit for $450. That's for 2 fans and mounting brackets; no shroud. They don't say whose fans they use. You'd think they'd mention it, if they were Spal fans or some other high quality fan. With switch, bushings and tax, I can see how you paid $1300.00
$1,000 is a good deal depending on the fans. If they are Spal fans, it's a good deal. If they are cheap "Made in China" fans, $1,000 is too much.
Have you tried returning everything to PIM? I know they are difficult when it comes to such things, even when the part they sold you is wrong, but it's worth a try. Perhaps if you pay a reasonable restocking fee?