Titan Swap Shock Question

So I did my T-Swap last week and got my alignment done. With the swap, I kept my Bilstein and OEM coil spring set up, but every now and then there is a clunk when I go over a large bump. The only thing I can contribute it to is the lower shock mount. Has anyone put bushings or washers between the lower shock point and the mount bracket on the LCA? And if so, where did you get them? I thought about some OEM washers, but wasn't sure.