I am pretty sure that the 4 mounting studs are wider apart at the bottom instead of the top but could you possibly modify and invert the hangers?
Maybe sandwich the modified hanger between a 1/4" steel plate and the car body for extra strength if you feel the modifications need reinforcement?

On a side note since the spring pivots on the rear hanger you will have to lower the front bolt a lot more than 1" to get 1" body lift. Getting 1.5" might require lowering the front mount and the rear hanger 1.5" at the same time.

I'm thinking re-arching the spring would be the way to go. Possibly some helper springs/air bags might work too.

Dare I say it Air Shocks, not pumped too much but just for the little lift. (Let the mud slinging start for me offering the suggestion of air shocks begin)

IF you do go the air shock route I suggest putting separate fill points for each shock to prevent air from migrating shock to shock.