I got the UB Machine arms last week. Only $120 shipped, but took nearly two months to get them. I purchased the cheapest C10 ball joints I could find to run with them.
Control Arms:UB Machine upper control arms are a popular choice. Dusterbd13, an S10 enthusiast and member of this site went through the trouble of designing these arms with UB Machine to take advantage of tall spindles or tall ball joints. It is a shorter arm with other geometry improvements. UB Machine provides two ball joint plate options. Arms with either a C10 ball joint plate or S10 ball joint plate can be ordered. Part numbers are below.C10 Ball Joint Upper Control ArmsLeft - 15-0739-6LRight - 15-0739-6RS10 Ball Joint Upper Control ArmsLeft - 14-0739-6LRight - 140739-6R