Neat idea but between the availability of improved big-port aftermarket SB wedge heads and the fact that the G3 Hemi is essentially a heavily modified/updated SBM with Hemi heads, there isn't much point...
Except those Hemi heads for the small block were about 35 years before the gen3 Hemi was even on the design board. So yeah, there was a point. I'm not sure if they're available anymore, but the web site has been up and going forever.