Here we go. Refer to the link.
http://www.flat6innovations.com/shop/product.php?productid=16159&cat=371&page=1
What I don't know is if this is just the price for the engine and then there's labor on top of that, or if this is the price you'd pay to purchase and have Flat 6 drop it in for you, but I'm gonna doubt the latter. (EDIT:Apparently I can't read, first sentence indeed says that the cost shown doesn't include installation/shipping, at least when it comes to CPO engines...I'm on a roll today).
Also remember that you can track down an S anywhere from MY2000 on. It may not have 405hp, but it'll have plenty more than 201.
EDIT: BTW, you can mount the roof rack with a hardtop on the vehicle, the total of the two items still coming in waaaay below the cost of another car.