If you wanna go playing around with cams you can do it via VCM Suite....... I mean honestly it'd virtually workout the same as getting some made. Cams are controlled via the ECU these days....... this is why they dont make them. You can just change the setup via tuning software.
eg. I'm running a heavily modified VE SV6 tune on my 175kw auto vz exec.
firstly, mucking around with vcm suite is not going to change the timing of the cams, because theyre done with timing chains..... and it's not going to change the profile of the cam lobes either... so that's rubbish...
And secondly, you can't run a "heavily modified VE SV6 tune on your 175kw auto vz exec"... so whoever told you that just ripped you off... There are different components on an SV6 in the inlet manifold, and i beleive there are subtle cam and throttle control differences in the PCM that can't just be "transferred over". They also have a different gearbox to yours.
Nothing personal, i'm not nitpicking, just that the alloytecs are complex and easy to get confused over. I've done enough (probably too much) work to mine to discover that they're very difficult to get anything out of.
If the OP wants to try cams out, by all means go for it.
it would be great for the community to get some feedback on what could very well be the most effective means of powering up an alloytec