Mario;

I don't think a VW switch will hep because it doesn't address the fact that the IGN switch is an assembly with the armored cable and coil ...it would require a lot of work to convert over (including separating the armored cable, and at this point, there's really no reason to cut everything up)...I'd recommend turning the IGN switch to the IGN ON position by whatever means possible, and extracting the lock cylinder (stuck release button can usually be freed by applying some light oil and repeated manipulation)...once removed, you have the option of replacing or using a stubby screwdriver (0$ solution) until you do find a (used) replacement (<$65 solution), or extract the key remains and have a replacement key made (~$20 solution)...the screwdriver obviously is not nearly as susceptible to breaking off, but if you replace the lock cylinder (either with current one or a replacement one), a start pushbutton is clearly recommended (additional $20, but the final fix!).

Cheers