It might not hurt to call Eddie at Quadvan. He offers Bilsteins as an upgrade over his normal shocks, so even though his 4x4 setup is different, the travel is probably close to the same as the SMB 4x4 system, and he probably knows which models to buy. You might even be able to buy them through Quadvan.
SMB-less as of 02/04/2012. Our savings account is richer, but our adventures are poorer.