Well, unless there is a suggestion I'm afraid I'll have to move on to something else.
It really is a shame. MAMP Pro costs money, which is fine, because it works well. Unfortunately, if there is a problem with your order they don't respond to technical support.
Here there appears to be some support even without paying for a license, which is great. But the product installation just doesn't work, on Mac OS Mountain Lion at least.
I've lost 5 hours on this installation so far and can't afford to lose more time. The installation for MAMP Pro took less than 10 minutes, so even paying for it another time will be more cost effective (if annoying). Multiply that for each of the 5 users in our company and it starts to get significant.