X3 for Springs n Things (ESPO). Placed an order before Christmas after talking with Laura several times. As noted by Dan, she asked about A/C, stating there is a higher rate spring to offset the added weight up front. Haven't received the order yet, but they were very competitive, helpful, responsive....all that you want in a supplier. I bought the springs and almost all of the steering and suspension pieces for my rebuild. They sell McQuay-Norris parts that are said to have been made in the USA before manufacturing was moved offshore. Based on the comments from others, I expect to be fully satisfied when the order arrives.
Good luck!
Chuck