Who makes one?

That QA1 is the same one CAPauto made and sold to QA1. I had one was not pleased with the mounting bolts used and the excessive slip in mount holes. I don't know if QA1 changed any of the Designes I'm sure the welds are better. Than Crapautos where. I tossed mine.

I wouldn't compare the QA1 products with the ones from CAP auto. QA1 didn't change the design of some of the parts, but it wasn't the design of most of CAP's stuff that was the problem. I had a set of CAP's tubular LCA's on my Challenger that had a weld fail. I also have a new set of the QA1 tubular LCA's. The design didn't change because it was a good design, but the quality changed completely. Very high quality stuff from QA1. The tubular UCA's on the other hand were completely re-designed by QA1. I had a set of those too, and the QA1 stuff is totally different.

Bottom line is that QA1 changed the designs that needed to be changed, and improved the quality of the parts that had good designs. I wouldn't worry about the tubular QA1 k-member failing personally. Although I don't really see the need for one either, but I can do that welding to reinforce the stock K's myself.