The same thing happened to me a while back after I jumped my Blazer... Both sides (passenger and driver) were ripped off the frame. I just ditched the stock mounting locations, mounted the DIY inboarding shock crossmember, had the DIY lower shock mounts welded to the top of axle, then installed my shocks. I thought about re-using the stock locations but the cracks are too wide on the passenger side so I said screw it.