If you are in need of an accurate Grizzly turret order the Best Value Models (Azimut Productions) Grizzly conversion from France. It has a good basic Grizzly turret.
If you want an updated turret that would be correct for the MTVE order the Best Value Models (Azimut Productions) Canadian M113A3 TLAV conversion. The turret is excellent.
Here's my TLAV...with One Metre Turret.