power to manual disc swap.
Adam,
A quick check on
www.rockauto.com shows A-1 CARDONE Part # 5476206 available for $118.79 - This is a rebuild and return service so you will have to send your existing booster in and then get it back. Only real difference will be in the finish - it will come back painted or bare, not cadmium / zinc plated.
Hope that helps!