Welcome aboard Scott!!
As for the ackerman arms either the King Headz or Eck-tec will be fine, I own a couple of each. The Eck-tec is neat because it has 4 hole positions, so it allows for a little more adjustability. But like you said it's out of stock.
Personally I really like dealing with Jim at King Headz, he's a real nice guy and always glad to help. I worked with him on those hinge pin brackets for the top hinge pins, and I'm supposed to be sending him pics and measurements of the ackerman with 4 holes. Carolinas has the blue ackerman in stock, but I really like King Headz black stuff, just give Jim a call and he'll hook ya up, tell him Ryan in KY sent ya!!
(219)405-1024
www.kingheadz.com
http://carolinasrc.com/Webstore/Scri...idproduct=1407