Hi plantain,
Those files should be included in the directory of WRFPLUS/inc if you compiled WRFPLUS successfully. Please refer to Users' Guide as below:
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> gunzip WRFV4.3.tar.gz
> tar -xf WRFV4.3.tar
> mv WRF WRFPLUS
> cd WRFPLUS
> ./configure wrfplus
As with 3D-Var, “serial” means single-processor, and “dmpar” means Distributed Memory Parallel (MPI). Be sure to select the same option for WRFPLUS as you will use for WRFDA.
Compile WRFPLUS
> ./compile wrfplus >& compile.out
> ls -ls main/*.exe
If compilation was successful, you should see the WRFPLUS executable (named wrfplus.exe):
53292 -rwxr-xr-x 1 user man 54513254 Apr 6 22:43 main/wrfplus.exe
Finally, set the environment variable WRFPLUS_DIR to the appropriate directory:
>setenv WRFPLUS_DIR ${your_source_code_dir}/WRFPLUS