I'm glad so many ppl are interested in the mod.
I'm attaching the install instructions so everyone can get an idea before making the purchase:
http://www.thuleracks.com/thule/inst...%20870-872.pdf
Apostle, if you refer to page 3, the diagram in the middle on the right refers to 'cutting off the rectangular clamp'. Also, can you send a pic of your setup? I'm pretty sure you can fit a ski rack, you just need to offset to one side. If you look in my third pic you can see the wingnut is oriented lengthwise along the car, and the mighty mount for the ski rack is just to the right.
Xiaoz, for some reason the screws and wingnut did not come with the horizontal mighty mounts. I just happened to have a spare set. I can assure you that the carriage bolt is a regular size that can be found at your local hardware store. I've been thinking about replacing the wingnut for security reasons.
2K1 1K2, you can pick up the Thule fairing at your local REI or outdoor store, cost $45 + tax.
The mighty mounts can be purchased at isuzuparts.net or St. Charles Isuzu:
the horizontal mighty mount part # 2-90116-905-0
I ordered from isuzuparts.net and the price is $16.12 for a set of 4, and $7.95 with shipping. total $24.07
hope this helps everyone.