php web application using adwords API

I need further development on a ppc management application which has reached beta testing, but needs refinements on user interface, expansion of user interface for managing API keys and google accounts, and implementation of the public web site and how it interfaces with the application. We have been working with a company who has done a good job completing the project so far, but now that we have reached the beta testing phase, they are just not able to respond quickly enough to necessary changes - each time we send updates or bug fixes it takes them weeks to respond, and it is slowing development to a crawl. We need a US or Canada based project manager with some experience with web applications, and we need to be able to get turnarounds on small updates in days, not weeks. The application uses the adwords API , and is written in PHP , using the mvc framework.