I take what your describing as this = you need spherical cylinder rotation to follow the track of your independent. Ideally what lowriders use on high end installs is called a spherical bearing. You just measure the O.D. on your cylinders and buy one with the same size I.D. from a manufacturer or manufacturing supply distributor. But they're kinda pricey so what a lot a installers usually do for your average install is opt for a high quality rubber flange to slide inside a doughnut for flex instead. Street guys cut pipe and slide a little kids Rubbermaid sippy cup in it with a hole in the bottom lol. That's kinda all side of the spectrum, from the 150,000 show vehicles clear down to the barrio. Hope that helps out man, if I misunderstood just drop me an e-mail anytime for advice (modifiers.
j@gmail.com - I'm not a minitrucker so I'm not on here much)