Torsion bar dust cover installation

Looking for some help! Installing new torsion bars and can't figure out how to get the darned dust cover (boot, balloon seal or whatever it is called) over the end of the bar. The covers I bought are WAY to stiff to stretch that much so either there is a special tool, a trick or I have to split the inside part of the cover to allow it to slide over the end. Any guidance would be greatly appreciated.