Where to find LP clamps?

I used to use the VPI Derlin clamp with the TNT I used to have. Upon getting back into analog with a MMF-7, I have been told that a "Ring-mat" without the clamp is the way to go. I would have to agree and haven't gone back to the clamp yet. I had intentions of using the clamp prior to buying another table to. Listen and enjoy the music :-)

...so, you want to find first clamp and than match the turntable??::))

Don't go for Sota or VPI clamp that realy can only make the record placement worse than it used to be since they're too heavy.

For a proper clamping you need to very slightly couple the record to the platter or mat (I would recommend a donut-shape mat to use with clamp)

I have Michell Gyro SE turntable with Michell clamp that gives me an extra flexibility either to firmly couple the record to the platter or just place it without locking that couples it slightly or not to use it at all. I all three different situations you should realize that the sound is different.
The first described situation I use on extra bright vinyls with poor mastering. If I lock the clamp my record will be firmly coupled to the platter and there will be a significant roll-off of high freequencies with even vast sacrifice of details. If I use no clamp I get airy presentation that is very suitable for small bands. In second case unlocked Michell clamp adds a tonal control that I often use for sophisticated instrumental and electronic music which is probably 70% of my entire collection.

Marakanetz, I have to take exception IMO to your description of firm clamping as causing a 'vast sacrifice of details'. The HF attenuation you hear is the reduction of spurious resonances in the record itself, which although sometimes regarded as adding pleasant (if inaccurate) 'air' to the presentation, are not increasing transparency to recorded detail - on the contrary, they're reducing it.

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.