Have a 2500 Dodge Diesel crew cab with a tuff country 6" coil spacer lift kit.

With the truck on flat surface I can get under the truck and make the control arms rattle as there is play between the bolt and spacer surrounding the bushing it really rattles when on a rough road.

I replaced these bushing about 2 years ago not sure what brand the guy replaced them with.

Looking to buy either a larger diameter bolt to fill the spacer and Polyurethane bushings instead of a hard plastic.

Any ideas on a fix or where I can start buy replacing these with a polyurethane bushing?