supclust is an R package which has been on CRAN since January 2004, see (https://cran.r-project.org/package=supclust).
It contains C and R code, written by Marcel Dettling in 2003, implementing the WILMA and PELORA algorithms for supervised clustering of potentially many predictor variables, notably for gene modeling.
Martin Maechler who had helped originally in getting the R package to CRAN had taken maintenance in 2009, to prevent long term orphaning of the package.
The source code has been moved to github only on Oct 15, 2020, using my own G2RCSn utility and notably the rcs-fast-export.rb ruby script, see also my blog post about how I achieved such a transformation for my sfsmisc CRAN R package.