Haha, nah man, I'm no lowering business, I just love hell low cars...if it was my car I'd do it the dodgy way, and forget about certification, but I'm not going to recommend being stupid...
Have a talk to some local suspension places, I'm not really sure what kind of place exactly would do the work, but they should be able to point you in the right direction. Its important to use people that really know their shit when it comes to getting things certified, as I said, it needs to be safe.
40mm clearance is going to make it difficult to drive everyday, I had a car that sat 40-45mm at the crossmember, it was an issue to drive...and being a VR4 didn't even look that low.