If you are looking for a  SAP front end installer ‌  to download, or a SAP IDES access, check the excellent Michael Management Corporation: https://www.michaelmanagement.com/sap-access.asp?aid=107112&utm_source=ytb
Read the full walkthrough: https://www.newsaperp.com/en/blog-sapgui-sap-gui-installation-steps-750
The first step is to download the corresponding files, which must be an installer and a patch. The files are taking more than 1 gigabyte of disk space when compressed, therefore make sure that you have enough space and a good enough connection before download and install.
Once downloaded, start unzipping the file by right clicking on the archive in the file explorer.
Select the folder in which the files should be extracted. Make sure that at least 2 gigabytes of disk space is available for the whole files to be extracted.
The compressed archive unzipping will take some time, as there are nearly 2 gigabytes of data to create.
Start the installer SetupAll
Once the archive has fully been extracted, navigate to the folder SAP install folder - PRES1 - GUI - WINDOWS - WIN32 - SetupAll.exe and run the executable file to start the SAP GUI 750 installation.
The SAP GUI installer wizard will guide you through the installation.