I have to agree with Jim, the camshaft spec variations from engine-to-engine were minimal. 1.9, 2.0, 2.2, 2.4 are all within .010" lift of each other, and within a couple degrees of duration. The biggest differences are the cam timing.
To me, the only stock Opel cam worth a damn is the old solid lifter 1.9 cam, or if you can find one, a Rekord Sprint camshaft.
Bob