07 Avalanche, Aluminum Lower A Control arms to Steel arms?

[63chevyll]

Anyone know the compatability of the newer GM trucks and lower control arms?

I have a 07 Avalanche with bad lower ball joints, which requires a complete new lower control arm to get the new ball joint

Do the 08 and up chevy 4x4's has cast or aluminum lower A Arms?

I was wondering if i could swap them out for a set of cast iron Lower arms, or some sort of lower control arm with a replacable ball joint. maybe aftermarket???

the Avalanche has struts and coil springs.

thanks if you have done this before