I got them from Crutchfield. Here is the link http://www.crutchfield.com/S-kwcGILVTiqd/
It looks like they are still running the same special. Freight was in the order of 15 to 16 for each of the two shipments. No tax which also saved me a bundle. I found other sites that had lower prices on the towers, but then you had to PAY for the 150's. Gees. Then add freight & tax and I was looking at over $1600 total and no mfg warrenty.