I got one of my two sets of my Yakima Wing Bars from here:
http://store.yahoo.com/rack-warehouse/y0309c.html

I bet they'll sell you just the bars, seeing as they apparently still have them after so long.

It's not easy to find the Yakima Wing Bars these days. The Isuzu bars are easy to come by, but they're so short...

For the rest of the parts, that PDF is a great resource. Wish I had seen it last year.

That vmag post details what I went through building my rack last year, so I won't rehash all of it here.

-Daver