I just caught up on a lot of correspondence, and found that several people were looking for a socket support like this one made by a friend in Spain. It is ideal for cases where the amount of stub isn’t enough to fully anchor.
My first attempt is crude, but does support “helper sockets” on the right and/or left side with independent parameters. The OpenSCAD v3.6 file is attached, and the same as v3.5.5 which is on thingiverse, except for this one change. Hit me up if you have any problems with it!