Did you try to create an offline installation package via SIM on your server, where ITMS 7.1 SP2 MP1.1 is already installed?
- Open SIM -> create installation package -> choose "Show all versions" -> choose ITMS 7.1 SP2 MP1.1 -> create installation package. (It should include current version of SIM - AFAIR SIM latest version is 7.5.242 on solutionsam)
Copy this installation package .exe on new server and proceed with installation.