I would have it done at the place that gave you the lowest quote. You're going to open up a huge can of worms when it comes to removing the dash, and you run a big risk of destroying the dash in the process. Are you sure there is not some sort of recall or warranty that will cover this?
Steering stabilizers will not cure or cause death wobble, they only mask the real problem that is causing death wobble. Oil pumps do not make pressure, they create flow. Bearing clearence and restrictions make pressure. It's the crank sensor.