i currently have a set on my car at the moment, i fitted them myself, pretty easy to fit, as they do bolt straight on to the existing holes (no welding needed)....
but i did have to cut/role the inside of the wing.....
to do this, you have to strip the whole of the front end.
the good thing about these kits is that they can adjust to your requirement, how much they open before they lift, how high you want the door to lift up.
i bought my set of keron, i think he still has a set for sale? maybe worth a try asking him.
it might be best if you see a car with the lambo kit on, as then you can see what your getting into!