Yes, as Dr. Horse(Blue Jays)mentioned above, we've discussed several times such a center speaker for those who want a horizontal appearance/fit, not as big/expensive as the VP180, but with wide, smooth, dispersion. The W T/M W configuration is available from several competitors, and a good design at a moderate cost could replace the VP100 and/or VP150.
Floyd Toole discusses this in Sound Reproduction in a section on horizontal centre channels and how a properly WM^TW with a dedicated midrange is a superior design for wide, smooth dispersion and for best consistent performance from listening room to listening room. He really stresses the importance off-axis and the polar response and how other driver complements are flawed in this regard because they suffer from off-axis interference which can be audible and is non-optimal. He discusses that the WM^TW can eliminate this problem.
