Well, believe it or not, I think I found some Mighty Mount horizontals for the factory bars:

http://cgi.ebay.com/ws/eBayISAPI.dll...m=250262254617

They were listed as Yakima Mightymount Horizontal Part No. 3601, but they are definately for the WingRider bar. I compared close-up pictures with these and the Moncha auction to confirm. So, I may have lucked out. I also saw some foreign country listings for both these and the verticals.

Kenny, I see where the edge of the base of the rack comes right up the the bar endcaps. Does the rack sit completely down on the top of the bar rubber, or does it extend slightly over the endcaps on both sides? ('Not sure if that made sense).