Bug Roof Rack Clamps

[TripleJackInGA]

OK, the car I bought has a home-made roof rack, which I want to keep and use, but I need to re-do the feet and clamps. They damage the car the way they are now.
I want to try and use a clamp like this:

http://www.thesamba.com/vw/classifieds/detail.php?id=102505

or this:

http://www.thesamba.com/vw/classifieds/detail.php?id=176854

DOes anyone know if they repop the first one? I don't want to spend a ton on just clamps that I'm likely going to have to modify anyway.I'm looking to spend between $10 and $15.

In both examples, does anyone know if the clamp needs to be pulled straight up, or can you nistall it at an angle?
What I want is a simple strong clamp that I can get to grip the drip-rails, and then attach a threaded rod/hook to the rack itself.

I like these, but the guy says they won't work on a beetle:

http://www.thesamba.com/vw/classifieds/detail.php?id=128335

Thanks!

- TJ