Login to CA Support Website, click HOME, then click DONWLOAD MANAGEMENT.
Type Endevor from the top drop down list and choose CA Endevor Software Change Manager (SCM)
Then click Product Downloads Available, and scroll down to find CA Endevor Software Change Manager MVS
click CA Endevor Software Change Manager MVS, this will bring you to another page where you can choose release and service pack from the top right corner.
For V17, choose 17.0 from release drop down list, and S1412 for the service pack, you will find CA SOFTWARE CHANGE MANAGER V17.0 S1412 MEDIA DVD11143027E.pax.Z.
For V18, choose 18.0 from release drop down list, and INC00 for the service pack, you will find CA Endevor Software Change Manager V18.0 INC00 Media DVD05121257E.pax.Z
Choose either add to cart, or to immediately download the PAX file.
Once download is complete, follow Installing Your Product Using Pax ESD or DVD to install Endevor.