Personally I don't allow Lizards in Mordheim and I don't understand why it would be considered because so many of their rules are wasted in an urban setting. However, they could also be seen as Deep Ones or some other reclusive race flushed from their lair by the comet. To each their own. Since we play so frequently in Lustria and the Southlands and rarely in Mordheim, no one complains much.
The stats were given in the official errata in TC #12, p.44.
M6 Ws5 Bs6 S4 T3 W3 I7 A4 L8
M4 Ws6 Bs0 S5 T5 W3 I4 A4+1 L10