Chris,
Alex is right concerning the relationship between diameter, height and pressing condition.
In our shop we have many sizes apart from the 4,5 and 7" moulds.
If you let me know what sizes you are looking for we will see if we can get one / some for you. In addition we can advise on the pressing this specific mould requires.
Mind you, the advise is a guideline: how you press your cheese depends on many factors: the cheese size, the curd, the desired rind of the cheese, the desired texture of your cheese etc. Trial and error...