OP - Did you find an aftermarket solution for this that you are happy with? I am currently researching the same dilemma on our 2015 Tahoe LTZ with 62K. All 4 shocks are leaking and when you hit a speed bump you hear an awful clunk/screech from the Tahoe.
I have been wanting to lower the front 2" and rear 4" and thought maybe I would do this all at the same time if I could find an aftermarket solution for the shocks. Almost 300 for each shock because of the Magneride seems outrageous.
Any help or direction would be greatly appreciated. Thank you!