P3D Mounting method & question

["Joe Feldman" <joef@xxxxxxxxxxxxx>]

I use the heat seal mounts, but I rarely heat seal them. To mount the slides
I slice some clear "scotch" tape into thin strips on one of those green
"self-healing" cutting boards. I then use these to hold the slide in
position. I use another piece of tape to temporarily seal the mount, then
check it in a viewer. If it isn't right, I can go back and fix it. I then
simply tape down the slide and tape the edges of the mount closed.  I won't
recommend this method, it is just the one that I use.
I am curious about these RBT mounts that everyone seems to be raving about.
Where does one find them for sale?

Joe Feldman