It's not a good match.
Even if you find a drop in that fits, You still will have a huge amount of light blocked inside the head. The malkoff dropins uses tir optic and reflectors smaller than the normal sized reflector for a p60. (27mm). And the opening in front is too small for a ~27mm reflector. So unless you got a malkoff module, dont bother. It will be like shining a light trough a keyhole. Lots of light lost, unless you use a lathe or dremel and open the front up more on the vmw head.