For the time being, and to get you home, clean the windshield thoroughly with dishwashing soap and water (Dawn seems to work best), then give it a really good coat of RainX.
Done properly on a clean windshield, you won't need wipers for a long time. When the RainX starts to fail, simple repeat the process.
I did a 300 mile run in the rain and never turned on the wipers with a RainX'd windshield.
Once you get home, call Luke: 1-888-262-2434. He'll have the correct parts to fix your Sprague air motors - which, btw, when operating properly, are actually more powerful than electrics.
FWIW & HTH. . .