Where to find LP clamps?

I agree with Zaikesman. The same thing takes place when folks use "springy" unsupported platter mats such as the Ringmat, etc... These types of devices artificially boost the high frequencies, making a dull recording or improperly matched phono system sound more "alive" and / or "open". Under extreme test conditions, one can even measure reduced tracking ability when using unsupported platter mat's. As such, all they can do is reduce a phono system's ability to perform to full potential. Sean
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I might argue on that since Michell uses an acrylic platter that I cannot consider it "springy" or unsupported and the clamp realy works best if only applied without locking on the Michell. The same I can say about Oracle tables where you should only slightly screw the clamp to touch the label. Simply saying when you couple a record directly to the platter the minimal clamping is sufficient and best.

M., you are correct in pointing out (as I also referred to in my first post) that the platter/mat situation makes a difference in these regards. In addition, I do think it is possible in some instances, with a soft mat and a thin-vinyl pressing, to 'over-clamp', deforming the record and placing it under stress. Although I doubt that the light weight of the Michell clamp by itself, untightened and acting merely with gravity, could have much of a positive effect (in fact, it could have a deleterious effect if allowed to vibrate), at least we agree that it is a good clamp at a low price.

Thanks everyone for your ideas/suggestions/discussion. It's been enlightening!