As Neil says, a QCTP for a 7 Series Myford should be suitable, since they have the same 3.5" centre height as the ML4.
Cannot remember if the stud for the toolpost is 7/16" like the 7 Series, (Brian? ) but from what folk say on here, some sort of modification is needed to either toolpost or stud. Almost inevitable if the toolpost is new since it will be Metric and going onto an Imperial machine.
Enjoy yourself!
Howard