I have googled until I'm blue in the face (that'll bring some abuse) and cannot find a product I've learned to love.  I don't use it so much for planes but it has become indespensible in the luthier shop.  I got these at the Toledo show two years ago and simply can't find new ones so thought I'd call for HELP!!
They are foam backed abrasives and that is all it says on the package other than "Sandman Abrasives".  It gives the contents as Super Fine - 600-800,  then micro-fine  800 - 1200, and finally micro-fine +  1500 - 2000
I've tried the 3M foam backed sheets and they just don't compare to the good results I get with these.
What I love most is they cut like the lower number but leave a finish like the higher number of grit!  Annnnnnddd - you can feel when they stop cutting!
So - does anyone know where I can get these particular brand sheets?  All the google results do is lead me to a bunch of obscure results that give no specifics as to grit, price, or even how to order and I'm getting frustrated with that.
If ya knoiws where I can find them I'll be ever so grateful!  (Now it's back to Jeff Beck for some relaxation during break.)
Thanks guys,
Will

Thanks Randy! 
Their micro-mesh looks like a good answer for what I'm looking for.  I can sand an instrument from 400 wet through the 2000 in less than a half hour with this stuff and be ready to buff!  I love it.
Blessings,
Will

Another site to add to my favorites thats going to cost me. (SIGH)

David,
I had to start a new folder on this sanding stuff in my favorites!  And Klingspor is the first entry.

Randy, I'll definitely give it a try to compare it with 3M's stuff.  Thanks.
Will