Yes it's easily possible; Basically:
On a PC with internet connection run:
phoronix-test-suite install <whatever tests you want, etc>
run: phoronix-test-suite make-download-cache
then within ~/.phoronix-test-suite/download-cache/ will be all of the test files. Simply copy the files over to the new PCs to the same location of download-cache/ and you should be set. See other details in the included documentation, etc.