How come W2 heads aren't made by all

From what remember the Batten head was the aluminum version of the W2. Then they made the intake runners rectangular, Exhaust stayed the same. Indy bought the patend. My batten intake bolts right up to my Indy heads. and the 2 inch W-2 headers bolt right on also. So if you want the new version of the W-2 buy Indy heads. In my opinion they are the best head for the small block. and you can use all 18 head studs on a R-3.