There are a couple of sewing machine groups you might look for. As was mentioned, most all of the yahoo groups have moved or faded away. Those that have not faded away have either moved to facebook or to groups.io. I looked at the yahoo groups that came up when I searched for Pfaff. Most of those that moved to groups.io kept their old yahoo names. One that was active last month was oldpfaffpforum (no, that's not mispelled). Some of the yahoo groups moved a while back, before they were forced. One of those might be pfaff_fixit. Another group that might be helpful is called wefixit (they bill themselves as shadetree sewing machine mechanics), and I'm sure they moved to groups.io as I'm a member. Go to groups.io and search for those groups.
Another idea is to search for a group on facebook. I don't do facebook, but apparently everyone else in the world does. They have all kinds of groups. Some are pubic and some you have to join and be approved. Just search for Pfaff and pfaff 130.
Sorry I'm not more help.
bkay