does it even still exist

As far as I know the last release was for Gimp 2.6 https://sourceforge.net/projects/gimpfx ... -2.6-1.zip 118 scripts. Do not expect many of these to work out-of-the-box

Many have be updated by Paul Sherman https://www.gimphelp.org/script210.html although the naming convention is different
example: jeschke-mats-and-frames.scm (from fxfoundry) is called 210_edges_mats-and-frames.scm

I have the 210_edges_mats-and-frames.scm downloaded and installed
thanks for the tip and the rapid response