Easiest way to get a pressurized leak test is to have a SealTech test done at a dealership. $100.
HOWEVER...
Since there is an inside ceiling and insulation between the cabin and the rubber roof these tests typically can not identify roof leaks.
Look for:
* Are your travel lights leaking? Common source of leaks
* Is it coming in from underneath the AC?
* Check the seals on all roof vents. If it is leaking you will typically be able to see the source.
* The front strip where the rubber ends and the front cap begings. This is also a very common area. Good place for a strip of Eternabond.
Good luck!