Here is a download link to the the tools that you need:
https://archive.org/download/tools_20210408_1513/tools.zip

Let us know if the link is broken or no longer working.
Here are the contents and sha1 hash of each to verify that they are correct:

4ce7bf5f48edb2705bfb5a42a841068727a499f8 *tools.zip

306526d90b48e99894c3138f5fc8f2716d9fecf6 *baserom.dol
12084f691270c74a55a1f06f3d6202c31aac4eb1 *mwcc_compiler\2.0\info.txt
0d2130e34e1651a7823ec57dc69cdf46fec563bd *mwcc_compiler\2.0\lmgr326b.dll
a379f8ac2f5c18d5071ed44261e75846f8a994ec *mwcc_compiler\2.0\mwasmeppc.exe
ef148743ee72be15f64926ac18c3aadc9cca2b47 *mwcc_compiler\2.0\mwcceppc.exe
2b457ed55287ea0d947d1643564a44bf7f6acf6e *mwcc_compiler\2.0\mwldeppc.exe
0d2130e34e1651a7823ec57dc69cdf46fec563bd *mwcc_compiler\2.7\lmgr326b.dll
a379f8ac2f5c18d5071ed44261e75846f8a994ec *mwcc_compiler\2.7\mwasmeppc.exe
100dd3a2898a1ece55462801d42ff5de8b42e29f *mwcc_compiler\2.7\mwcceppc.exe
8225a47ff099a3aecb32cd307a95cb69b30a6a84 *mwcc_compiler\2.7\mwldeppc.exe

Place `baserom.dol` in the root of the project, and move the `mwcc_compiler` folder into `tools/`