using ifort instead of mesasdk

I am trying to setup MESA on one of the TACC machines (Lonestar6) using their ifort (IFORT) 19.1.1.217 20200306.
However, in my copy of MESA version 26.04.1, I cannot locate either of the makefile_header files referred to below (from the MESA installation website):

Not using the MESA SDK means you’ll need to replace the file $MESA_DIR/utils/makefile_header with a version customized to your system. There’s a template to get you started at $MESA_DIR/utils/makefile_header_non_mesasdk.

Have these files moved somewhere else/ been deleted since the documentation was update in the latest revision?

Compare the installation website instructions with the MESA 26.04.1 tree, starting with $MESA_DIR/utils/makefile_header and makefile_header_non_mesasdk. Verify whether these files moved or were removed, then update the installation documentation so the ifort setup instructions point to the current locations or accurately describe the replacement process.

Written by the indexing model from the issue text.