He he - the Brodit things are cheaper on Amazon than the "need to be dremmelled" car panel adaptor. Might look at those. There is a grill above the radio in the centre so if they make a horizontal one it could go there in use, and into a small cubby when it needs to be hidden.
EDIT - Brodit looks a goer for me, once I save up...
and
In the second example I may be better off going for the LHD version for my RHD car as that empty central pod in the pics contains the SAT NAV in my car which is built in.
They have a pillar mount but not specific for my car. This mount would be perfect (804313) in RHD form...
this one is designed for an Insight.
EDIT2 - there are some fabrication options here too. *(dives off to workshop...)