Don-- I had no luck finding this locally. I found references to it on the Lowes and Amazon websites and both have it as unavailable. Looks to be discontinued.
PS: This place says limited stock remaining. Might be worth checking with.
https://www.fisheriessupply.com/3m-sandblaster-flexible-foam-sanding-pad-for-2in-x-4in-sanding-block
They only had it in 220 grit. I have no use for that grit. For something that coarse regular paper works fine. It is in the 400 and 600 grits that its advantages really shine.
I now have some of the 400. Jeff graciously sent me his remaining supply- he did not like how well it worked on wood.
It was worth a try. You’re welcome.
Hi Don ;
You know this is kinda funny . I had some and gave them to a friend who does " Cigar Box Guitars ". I actually didn’t like them ! I still use good old worn down "Wet or Dry "
Oh, I use a lot of just plain sandpaper too. The problem comes when sanding areas with compound curvature, specially hollow areas, or areas like wing root/fairing with double curvature. Then I have to resort to some sort of sponge.