I don't think they will work.
Do you have the roof basket? Check my pictures, the roof basket is narrower than our roof and I wouldn't rely on that tiny bracket to hold it. I would suggest either spend $50 on aftermarket cross bars (instead of $25 on something you don't know if it will work) or just try to find original brackets.
There are also some U bolts for sale on Amazon, but I am sure they won't work either.
If you have the roof rack with the extensions on the side to mount on the stock rails then you can use any kind of metal to mount and secure it. Just make it non-slip with some sticky stuff.
http://www.amazon.com/Valley-90490-U-BO ... 904&sr=8-4