Reply to "Looking for speciality tool.."

If you are going to drill from the underside it is just as easy (or difficult) to completely drill through the bolt.
When you go back in the car, presuming that you haven't already stripped the hex heads, the heads of the bolts on the frozen shafts will snap off.
At that point what is left in the nut will be less resistant to tuning.
You will need the proper size tap and drill bit at this point.
Drill it correctly undersized and most of the remaining bolt will want to unthread itself out.
Use threading oil on the tap, not wd40 and rethread it.
My prefference at this point would be to use stainless allen socket bolts with AN ss flat washers and anti-seize compound.
I don't remember what metric size is originally in there. I believe that I converted to a 5/16" at this point. I don't remember if it was NC or NF.
This all isn't going to happen in a few minutes.
You are in there for a full day to do both sides.
The left handed easyout isn't going to necessarily make it any faster or easier.
As I recall they are already left handed. That would mean that you should be looking for a right handed one.
I wouldn't bother with them. They won't work well in this situation anyway.