I'll PM you with some proper detail over the weekend.
I can answer this one!
Bear in mind; I'm not a Whiteline or Signature employee, but have dealt with both personally, so all of this is based on my own personal experience.
You're right; Selbys is gone. Sorta.
Todd Selby (of the Selby Family) still runs Signature Swaybars, and has now moved down the South Coast; along with his business. I contracted him to custom make 8 sets of Swaybars for me a year ago; his quality and attention to detail is incredible. He is an amazing font of knowledge and very keen to assist.
All of Selbys Intellectual Property was purchased by Fulcrum; who by my experience now charge a huge premium for old Selbys products.
All of the key Selbys R&D people now work for Whiteline So you have some seriously cluey, innovative people there; along with the ones who were already there.
Whiteline do manufacture offshore now and all of the product I've sold (over 40 sets of bars alone) is excellent. The finish and quality; to my eye, is perfect, turnaround times are excellent.They still do all of their R&D locally, and their product support is second to none. They use the latest technology to make their prototypes and also test them. I have no hesitation recommending AND using Whiteline gear.
All the feedback I've received from my Group Buys has been exemplary with regard to product quality.
Buying Whiteline is an excellent option both on price and quality; much better than some of the poorly finished US stuff (washers WELDED on to swaybars???) I wouldn't use their gear otherwise. They have taken their product worldwide; if that doesn't tell you it's good, I don't know what would.
I'll have full details for a Group Buy up next week.
Cheers, Dale.