The question was Tubular UCA too much, ok. The least expensive of what looks to be a decent UCA is the Dillinger Chassie piece. They make them for A,B,& E bodies. Poly Prothane urethane bushings and 5 degrees of positive caster built in. Gusseted at the ball joint. Also power coated multiple colors. Starting at $230.00. May be worth looking at.